The only thing that might be said about Hitler's military judgment is his decision to press on with an attack on Moscow in the winter of '41. But considering the Soviets reserve strength control of the railways was of urgent necessity, the decision to attack Moscow was not a blunder. The fact of the matter is the Germans winter offensive in Moscow was stalled by the best troops of the USSR, the Far Eastern divisions, accustom to extreme weather conditions. And Hitler's generals, tended to disobey orders, and did not have the ambition to follow through with the assault. Also, one of Hitler's most notorious interventions - his order of "no withdrawal" after the failure to take Moscow, ended up being absolutely the right call. A withdrawal at that time, and in those conditions, would have led to the German army being destroyed. The Soviets were pulling no punches with their counteroffensive - using their best troops, their remaining T-34s, etc, but they could not make any serious advance under those weather conditions.