I would agree that the Nazi government was not "chaotic". Hitler was indeed able to get more out of his followers than anyone would have thought he could. Hitler may have gotten greedy and tried to take too much.
I don't completely agree with the premise of the question. The governmental structure was not chaotic. Overly bureaucratic maybe, and quite competitive between the branches, but that is typical for any government. What caused the chaos was a sustained bombing campaign by the Allies, the drain on national resources for the war effort, especially oil, and the effect both of these had on industrial production.
But the Germans were quite successful at moving that production underground, and they solved their labor shortage by using hundreds of thousands of slave laborers from Poland and the Slavic nations. Their war production actually increased during the height of the bombing campaign as a result.
Your textbook has got to have stuff about this. Surely they're not just putting a question like this to you "cold" in HS...
To me, it's not the chaotic nature of government. To me, what really screwed up their production is that they did not want to make the people unhappy. They didn't recruit women to work in the factories. They didn't ration stuff. They didn't want to make the people restless and rebellious and that, to me, is why they had problems.
The government was extremely chaotic as it operated on a personal level to Hitler. Soldiers took an oath to give their lives for Hitler, not for Germany. This resulted in enormous expenditures for Hitler to use as he saw fit, not necessarily in the best interests of Germany. The fact that he lasted as long as he did was testament to his failings as a leader and as a someone who was focused on the war.
I am not sure if the assumption in the question, either about chaotic nature of Nazi Governmental Structure or failure of German war production in World War II are quite valid.
There is no doubt that Hitler was a dictator, a megalomaniac, and a ruthless person when it comes to killing people, either Jews, or his own supporters suspected of opposition to him. But, at the same time, we cannot overlook his ability of of organizing Germany into a strong country, before starting the war and continuing to ensure good supply of war material for Germany for a considerable long period. Also his ability as a military genius cannot be questioned. He lost war the war not because he lacked military ability, but because he tried to achieve the unachievable.