Yes and three biggest mistakes Hitler made when he invaded the USSR were:
1) Not providing his troops with winter clothing.
2) Not taking Moscow when it was doable.
3) Not treating well the local populations who were severely brutalized under the Soviet regime.
Had Hitler studied Napoleon as carefully as he studied Frederick the Great, he probably would have avoided invading the USSR altogether.
I think the single biggest mistake he made was declaring war on America. He should have issued a weaselly statement about supporting Japan in its struggle against Western Imperialism and left it at that.
Bad time to bring this up—playing into Putin’s Propaganda.