Which begs the question - how did the Germans get to Moscow, Stalingrad, and Kursk to begin with? Killing Russians. They ran out logistically/poor planning etc - let's not confuse that with Russians being tactically or warfighting superior. Was numbers and weather - not Russian skill.
Germany's generals wanted to make a temporary retreat from Russia in advance of the onset of winter, hold till spring, and then renew their advance. Hitler wouldn't hear of it, and essentially ordered them to win or die in a winter war on Russian soil, which the German army was not equipped for. Once he made that decision, Germany was doomed.
