Structuralist debate: Hitler was lazy, erratic, impulsive. He didn't care to learn more about the economic aspects of Germany (and other subjects that stemmed from the government that bored him). He would often take long vacations at his mountain house where it was hard to reach him, and due to this it wasn't even guaranteed that the documents that were sent to him were read before they were signed for approval. There was a competition within the Nazi branches because of his neglectfulness, and often generals were competing just to get to him first, as he wouldn't even pay attention to some documents handed to him. He often allowed others to make decisions for him. In addition, his economic plans weren't really theorized or thought through.
Intentionalist debate:
Hitler was a strong leader who had all aspects of the regime under control. He had full control of the SS, the army, and the Gestapo. There was very little opposition in 1934, and Hitler had control over all media and propaganda, courts, civil service, and created a one part state that pledged allegiance to him. He allowed for the competition to arise within the Nazi branches so that It would be easier for him to remain at the top, and his generals would compete against each other, not with his power.