History is too often written by the victors, and in this case, the historical accounts were manipulated into propaganda for the New Republic.

For instance, the idea that an out of control, damaged A-Wing could single-handedly take out a Super Star Destroyer by ramming its bridge is ridiculous-not only was the A-Wing notoriously unstable and would have likely blown up, but the Executor-class Super Star Destroyers had a secondary bridge in the midsection of the ship.

This is likely an exaggeration from the New Republic. Arvel Crynyd, the pilot in question, was hailed as a hero, even having a captured Star Destroyer named after him. The real reason the Executor went down is unknown, but some suspect there were Rebel infiltrators aboard that brought it down.

They also criticize the idea that it just "happened to be" that the Rebel starfighters were able to destroy the Death Star II just before it could target any more of the Rebel capital ships. They argue that it took more than 45 minutes to charge the super laser, and such that the Rebels had plenty of time to destroy it before it could fire again.

This is absolutely correct. While the second Death Star was significantly improved, the superlaser still took time to recharge. The Rebel starfighters had plenty of time to reach the core before the Death Star fired again.

Lastly, they also place a considerable amount of blame on the "brains" of the "EN Operation," Emperor Palpatine. They criticize both him and his second-in-command, Darth Vader, for having a lack of faith in their command staff and for coming up with a convoluted battleplan that prevented the Imperial Navy from adequately protecting the Death Star in order to "entrap the Rebels."

This is absolutely correct. There were none, zero ships defending the Death Star. The entire fleet in the system was arrayed behind the Rebels. At this point, it is unknown what would cause Emperor Palpatine to make such a gross miscalculation, but it is thought that he never expected the shield to go down, and thus did not expect a need for protection of the Death Star.

They placed too much faith in their Sith ideology, which, combined with the toxic anti-dissident culture of the Imperial Navy prevented commanders from taking individual action that may have otherwise saved the day.

It's not so much their ideology but a series of underestimations. The Ewoks were deemed to be harmless, which obviously was not the case. Thus the shield was expected to stay in place, allowing the Death Star to pick off enemy capital ships and leaving the rest to be mopped up by the fleet. Frankly, the entire disaster could have been avoided by deploying a proper garrison of stormtroopers, perhaps even the 501st, as they most certainly would have been more competent than the small security force on the moon.

All-in-all, this narrative greatly disagrees with the convention Republican view, and I was looking to see if there is any truth in their point of view.

There is a lot of truth in their point of view. The Republican view is marred by a huge quantity of propaganda released immediately after the Battle of Endor. The Imperial accounts are likely more accurate.

The Battle of Endor should have been a massive victory for the Empire. The Rebellion excelled in guerilla warfare style tactics; hit and run operations where the Rebels could concentrate their more limited firepower against where the Empire was the weakest. Even with the support of the Mon Calamari shipyards and a handful of captured Star Destroyers, the Empires overall numbers dwarved the Rebellion. The Rebels expected to be facing a small fleet protecting a defenseless Death Star, and thus chose to commit their capital resources. The surprise appearance of a sizable chunk of the Imperial Fleet as well as the unexpected operational Death Star superlaser should have crushed the Rebels in a classic Manadlorian hammer and anvil operation.

However, the Empire was not accounting for the tactics of Admiral Ackbar and General Calrissian. By making the decision to engage the Star Destroyers head-on, the Rebels neutralized the advantage of the Death Star. Close combat between capital ships had not been seen since the Clone Wars, and most Imperial Captains were not prepared for this. The introduction of the Ackbar slash, (where Rebel capital ships would fly in between two Imperial ships and attempt to cause friendly fire between the Imperial ships) was also a major advantage for the Rebels.

The unexpected destruction of the Executor was a huge loss as well; the largest capital ship in the fleet as well as the flagship of the battle was a huge blow. Admiral Needa was simply unprepared to deal with the nimble A-Wings, and thus saw the destruction of the main bridge. Under normal circumstances, the auxiliary bridge would take over, but the gravity well of the Death Star drew in the Star Destroyer before the bridge could come online.

The jury is still out on how effective the so called "battle meditation" of the Emperor was, or even if it existed. But the death of the Emperor, Darth Vader and much of the Imperial leadership created an immediate power vacuum. Some Imperial officers ordered their ships to retreat, so that they could try to consolidate power to take over. An estimated 25-35% of the capital ships fled the battle for these reasons. This caused a ripple effect, as more loyal officers such as Palleon fleeing in order to regroup, hoping to re-engage the Rebels after order was restored. Eventually, almost the entire fleet had fled for one reason or another, thus leaving the Rebels victors by default.

Sources: "Mon Cal Out of Water: The Life and Battles of Admiral Ackbar", "The Battle of Endor and the Rise of the New Republic" as well as assorted interviews that can be found on both the Republic and Imperial Remant Holonet.