No, it’s not “most” of it. Again, if you aren’t reading the German diaries, you’re clueless on what was happening in the Wehrmacht.
And the early winter and the fact the Germans didn’t have decent cold weather lubricants etc etc
And the fact that the Russians had all those fresh Siberian Divisions without which they would have lost
In any case that was a standard military campaign not a Guerrilla type war etc
And the fact the Iraqis decided that al Qaeda was worse than the USA etc etc