I doubt that very much. Within a decade his army had conquered then lost Europe. That does not make a good military commander. He overstretched his army, especially in Russia, which led to the eventual retreat from there. As the war progressed Hitler got more and more involved with military operations. This shows, as they started to lose more battles. In the beginning Hitler left the battles to very able generals. He, himself was not a very good military stratagist. But when a megolmaniac starts to say do this or die, people have a tendency to either do it or assassinate him. Assassination didn't work so it left them with the other route to follow.
Stalin, on the other hand went the other way. Full control of the army at the beginning of WW2, but eventually let his generals get on with the job. When he did that the fight turned to the USSRs favour.
I suggest you read a proper history book before making such general statements.