Funny enough, even as a dictatorship, Nazi Germany had a hard time moving to a proper total war economy. It wasn't until Speer took over that they were able to take some of the same steps as the allies- move women into factories, reduce production of civilian luxuries, and try to standardize their equipment. That was a big problem: too many different kinds of guns, tanks, fighters, trucks, ect- pressing the arms and equipment of at least six different armies is not the best thing for a logistical chain.
And then there was the whole thing of wasting countless millions on trying to develop wonder weapons that their industrial infrastructure could not produce in any quantity.
And then the biggest problem they had- Hitler. The man was an enthusiastic amateur who never could or would learn from his mistakes.