He broke his treaty with the USSR, if he hadn't done that and let his general's do their jobs he would have won. The U.S. was only capable of doing so much because so much of Germany's troops were wasted fighting Stalin's forces.
Apparently, during his reign (especially the last years of WWII) Hitler was administered many different types of 'medicine'. Some of which were based on morphine (for example, to kill the pain caused by one of the attempted assassinations on his life, others to increase his libido, and even more others to pep him up (like methamphetamine) or to sedate him when he had trouble sleeping. It is also my understanding that the usage of at least some of these drugs were commonplace among his followers and general households at the time (source: National Geographic (2015). Hitler the Junkie).
So his decisionmaking was influence-based, influencing an already influenced public - under influence. I say he's disqualified.
No. For instance, he originally built the Totenkopf section on - basic - physical criteria such as eye/hair color instead of their performances, strength or intelligence criteria. This caused numerous unecessary deaths, which have been replaced by even worse and unprepared people. Moreover, a non-negligible number of SS were not even German, contradicting Hitler's first thesis.
@Yani while that is true, it was his idea, against his general's advice, to group tanks into motorized regiments.
On the topic of non-military strategy, Hitler was a genius politician and oritorian.