Damn you Timoshenko for breaking our defence! ( But he solved quite many battles during his career )
http://en.wikipedia.org/wiki/Semyon_Timoshenko
Another thing i forgot which hampered the soviets was political commisars in the army, and general politicans trying to do stuff in the army, both the germans/soviets suffered from this. However as the war went on, Stalin let his generals act more freely, while as the war went on, Hitler tried to control everthing more and more.