I think it is absolutely fair to describe the Byzantine government at "byzantine" on the issue of complexity and bureaucratic bloat. Any government that lasts a long time is going to develop legacy titles; positions that used to do something important that, due to reforms by new leaders, are no longer important but haven't formally been destroyed. These positions are usually just ceremonial, honorary, or symbolic, and it's not worth the effort of destroying them. In England, for example, sheriffs used to be really important in the justice system in the Middle Ages. However, as governments have conducted legal reforms like introducing magistrate courts, the Crown Prosecution Service, and the police, there came a point where there was nothing left for sheriffs to do. The position of sheriff no longer comes with any meaningful responsibility and is used as an honorary title. However, for the sake of tradition (and also because the government has way more important things to do than tidy up outdated titles that don't matter), the title remains in use.

England has a lot of these legacy titles because the government has been going for hundreds of years, but it's nothing compared to the madness of the Byzantine Empire. It had direct legal continuity stretching back to the Roman Republic. By the Sack of Constantinople in 1204, the Byzantine Empire had obsolete titles stretching back 1400 years. Combined with periods of intense instability that required extensive reforms where old titles were chucked out in favour of new bureaucracies, this meant that there were a lot of obsolete titles kicking around that technically still mattered but in reality were just honorary, symbolic, or a convenient way to put someone on the payroll of the empire. Byzantine officials were also known to be rather sensitive about their titles, and an aristocratic culture of title collecting developed where positions had to be created just to avoid offending someone who's relatives had got a promotion and were therefore a higher stature. The Byzantine princess Anna Komnena tells about one such instance of this:

As it was necessary in accordance with his promise to bestow upon Melissenus Nicephorus the dignity of 'Caesar,' and it was only right that his eldest brother Isaac should be honoured with some higher title and there was no second degree except that of 'Caesar,' the Emperor Alexius invented a new name by compounding the names of 'Sebastos' [Greek for 'Augustus'] and 'Autocrator,' and bestowed upon his brother the title 'Sebastocrator,' making him, as it were, a second Emperor, and exalting him a step above the 'Caesar' who was now counted third in the acclamations, including the acclamation to the Emperor. Further he ordered that on the public festivals both the Sebastocrator and the Caesar should wear crowns which were, however, very inferior in grandeur to the diadem he wore himself. The imperial diadem, or tiara, was like a semi-spherical close-fitting cap, and profusely adorned with pearls and jewels, some inserted and some pendent ; on either side at the temples two lappets of pearls and jewels hung down on the cheeks. This diadem is the essentially distinctive feature of the Imperial dress. But the coronets of the Sebastocrators and Caesars are but sparingly decorated with pearls and jewels, and have no globe.

Simultaneously, Taronites, who had married the Emperor's sister, was created 'Protosebastos' and 'Protovestiaire,' and soon afterwards he was gazetted 'Panhypersebastos,' and then sat with the Caesar. Besides these his brother Adrian was dignified with the title of most illustrious Protosebastos, and his youngest brother Nicephorus, who had been promoted to be the 'great Drungaire' of the fleet, was now raised to the rank of the Sebasti. Now my father was the inventor of all these new honorary titles, some he made by compounding names, of which I gave an instance above, and the others by applying them to a new use. For names like 'Panhypersebastos' and 'Sebastocrator' and similar ones he compounded, but the dignity of 'Sebastos' he seems to me to have applied to a new use. For from olden times the epithet 'Sebastos' had been given only to the Emperors and the name 'Sebastos' was peculiar to them, and my father was the first to bestow it on several of lower rank. And if anyone were to reckon the art of ruling as a science and a kind of high philosophy, as if it were the art of all arts and the science of all sciences, then he would certainly admire my father as a skilful scientist and artist for having invented those new titles and functions in the Empire. Not but what the masters of the logical science have invented new names for the sake of clearness, but this man Alexius, the arch-scientist of Emperors, instituted them for the advantage of the Empire and often made innovations both in the apportioning of duties and in the bestowal of titles.

Do I even need to point out that this is batshit insane? And it's revealing of the Byzantine culture surrounding honorific titles that Anna thinks this is not only normal, but good. Many nobles wanted unique titles, or legacy titles like "consul" that didn't have any real work attached but carried historical prestige, and to keep their followers happy the emperor would often give in to these requests. For example, the title 'Nobelissimos' was an honorific title for members of the imperial family. However, Alexios Komnenos used the title to secure his power by granting the title to upset noblemen who could threaten his power if they had a bad enough day. But this diluted the title, so a new title - Protonobelissimos - was created for the imperial family to use. But later emperors had the same problem as Alexios Komnenos and used the same solution. So they diluted the title of Protonobelissimos by giving it out to upset nobles, and created another new title - Protonobelissimohypertatos - for the imperial family.

So let's say it's around 1200 and your province has experienced pirate raids and you need to write to the Byzantine government to get it sorted out. Who do you write to? An obvious place to start would be the local admiral, titled the Droungarios. However, that title has generally fallen out of use, as has the similar title Droungarokomes. So you think for a moment and maybe try the Megas Droungarios, except there are no people with that title who actually command ships. Oh dear. Then you remember that in the 1090s, the title of Megas Droungarios was replaced as head of the Byzantine navy by the newly created title of Megaduke (yes, really), and he exists! So you arrange to meet the Megaduke, and he turns out to be a guy named Michael Stryphnos. He has never commanded a fleet in his life, and although he has been tasked with leading a land campaign to squash some rebels, he is incompetent and spends a lot of time wining and dining rather than fighting, so the Megaduke is a dead end. Eventually you write to your brother who runs the Byzantine treasury and find out that there is no Byzantine navy because all the titles of the navy have been used as honorifics and sold off to placate grumpy officials who didn't support Emperor Isaac and they sold all the naval equipment to embezzle the money and nobody knows what to do about it.

That really happened, btw. This is what happened to Michael Choniates, archbishop of Athens, when he had troubles with bandits and pirates in his region. He was so unimpressed with the whole situation that he sent letters to central figures in the government telling them to get their shit together because at this rate the empire would fall apart in a matter of years. This included a strongly worded letter sent directly to the emperor, who seems to have entirely ignored it. The Fourth Crusade would prove Michael right a few years later. Michael's brother, Niketas Choniates, would write a scathing historical account of the period; a sorrowful and bitter reflection on the failure of Byzantine politics and how it led to the fall of Constantinople. He describes the Byzantine elite as:

Lying on their backs, in the manner of hogs, with their bellies stroked and their ears tickled by her affable greetings, they expressed no righteous anger whatsoever at what had taken place. In this manner was the way paved for Emperor Alexios's entry without bloodshed and with absolutely no one being deprived of his properties.

And describes the reign of the Angelos brothers (who were in charge in the years before the First Crusade) like this:

Besides these events, others come to mind which must not be overlooked. The Angelos brothers were guilty of poor administration of state affairs in other ways as well, as we have already recounted; particularly obsessed with the love of money, they were not content with enriching themselves from legitimate sources of revenue, nor did they hold on to the wealth they amassed but poured it out with both hands on the excessive indulgence of the body and costly ornamentation. Moreover, they enriched courtesans and kinsmen who were utterly useless to the state.

Tellingly, that he played a substantial role in this as the guy in charge of the money isn't something Niketas seems to fully understand.

So yeah, the Byzantine government was a mess.