Hitler had a ruling philosophy described as the Führerprinzip or "the leader principle" - he viewed the government as a pyramid with him on top. Nobody exercised power without his authority.

This style is best viewed, and best recorded, in his handling of the military. And let's look at the big picture here because there's a lot of reasoning behind that.

The country of Germany was a relatively recent creation. There was no unified country of Germany until 1871. The driving force behind a unified Germany was the kingdom of Prussia, which was the largest and most powerful nation among the unified Germany. As such, Prussian political principles tended to dominate Germany. Prussia is best described as militaristic. The Prussian military was its great pride and was "apolitical" - which is a word I use loosely because the military did have a lot of political power, but the culture was essentially that the military didn't interfere in politics and politics didn't interfere in the military. When the German government surrendered in WW1, it was known as "stab in the back" by many in military because the surrender was issued by a civilian government that took control after the Kaiser abdicated. The important thing to note is that the military tradition in Germany was used to a certain level of independence.

So, Hitler's Führerprinzip clashed with the military and Hitler was well aware of that. He also knew he needed the Wehrmacht and in reality a strong military coup was likely the only thing that could have stopped Hitler after 1934. There's a reason Hitler also bribed most of the Wehrmacht leaders for their loyalty. Most view that as the logic behind the formation and expansion of the SS, which was basically a seperate military branch that emphasized loyalty to the party. In time, it is believed that Hitler would have disbanded the Wehrmacht in favor of the SS.

Hitler's abiding view of the Wehrmacht was that they were too cautious and mostly disloyal to him. As early as 1936, when Hitler wanted to remilitarize the Rhineland, military leaders like his War Minister and Field Marshall Werner von Blomberg, Chief of General Staff General Ludwig Beck, and Army Commander in Chief Werner von Fritsch tried to talk him out of it, fearing that it would goad the French into attacking and that they were not in a position to repel a French invasion. Blomberg sort of came around, but when Germany moved troops in and there were some reports that the French were possibly mobilizing he begged - and almost convinced - Hitler to back off. Not surprisingly, by 1938, Blomberg was blackmailed into resignation in a sex scandal, Fritsch was outed as a homosexual and arrested, and Beck resigned over disagreements with Hitler and was later involved in the July 20 plot to assassinate Hitler.

As the war dragged on, and especially as Germany began losing, this paranoia regarding the Wehrmacht and micromanagement grew worse. At the battle of Stalingrad, Hitler had in his command center a map of the city and demanded reports and followed the fighting block by block. By 1944, troops basically didn't move without his orders.

To try and touch on the question a little more broadly, when it comes to legislation and bureaucratic matters, the Führerprinzip basically meant that Hitler's word was the legislation. There were no lower bodies of government that could act without his direction. Now it's fair to say that military and foreign affairs took up more of his personal attention. But matters such as the Final Solution began at a meeting in the Reichs Chancellery on December 12, 1941 - however he wasn't present at the follow up at the Wannsee Conference in January 1942. Hitler trusted delegating matters to his inner circle - as much as Hitler really "trusted" anyone, but nobody really acted on their own authority. Albert Speer would later say, and remember that he was also saying this after Hitler was dead and while he was trying to avoid the death penalty, that Nazi officials were wary of making decisions in Hitler's absence and it became a normal practice to avoid writing down rules and regulations to avoid responsibility and Hitler's wrath if things didn't work out well. Goering was once quoted: "When a decision has to be taken, none of us counts more than the stones on which we are standing. It is the Führer alone who decides." There's no aspect of German life during the Nazi period that Hitler didn't have a hand in. Local mayors were replaced with hand picked Nazis. School boards were replaced and curriculum was changed according to the party's vision. Unions, sports clubs, professional societies, anything you can think of, and Nazis were there. Society was basically reshaped in Hitler's image.

Now I will address one thing. There are people who portray Hitler as a bumbling leader with a laissez-faire approach to governing and that he was just surrounded by idealogues who ran the show. Those people tend to be the same Hitler apologists who try to claim he had no knowledge of the Holocaust despite having factual evidence to the contrary. The issue is that, especially towards the end of the war, Germany was losing and Hitler's paranoia became worse. His demands to receive reports from every commander in the field and to issue orders himself became overwhelming. But even in the final days in Berlin, hiding in the bunker, he was still in contact with what was left of the Nazi government and military commanders and still issuing orders. His last will and testament left specific orders for how the party was to be run his absence. Hitler was in control until the very end.

Eichmann would famously use the concept of the Führerprinzip to state that he "was just following orders." That's why you see Hitler apologists try to claim that his authority was exaggerated by men trying to save their own skin. But again, the documented evidence shows that Hitler was a "hands on" leader who inserted his ideology into every aspect of German life.