It was a combination of strategic indecisiveness and the later invasion date and early winter (i.e. the late drive to Moscow) that doomed the Nazi invasion in 41 (it was the Nazis best chance). If Barbarossa had gone on in early April or May 1941 as planned the Germans might have gotten a lot farther. Russia would have been taken by surprise regardless since Stalin was a big unsuspecting fan of Hitler and there were no plans for defending Eastern Europe from German attack. But since in AAE40 war is auto-dec on Round 4 and the territories have little IPC numbers attached to them that you automatically collect without partisan or civilian interference, there is no real reason for dragging the conflict out.
But yeah, LOL, I know what you mean, in real life the Reds and Nazis could have formed the new Commie-Nazi empire if Hitler had just waited and not backstabbed Russia when it was convenient. Or when the battle for England started going not so well.(Hell, I think the Brits were at war with Germany for upsetting the European balance of power (that was in UK’s favor pre-1941) more than anything. A unified Europe, whether Napoleanonic or Hitleresque, was the only real threat to the Empire, and Churchill knew it. Guess Hitler didn’t care, or realized the US with Lend-Lease was just itching for a reason to enter the war.) Why oh why did Hitler bite the Russian hand that fed him in 1941? Petulance, I guess? Or I guess the whole narcissistic megalomaniac dictator thing was taking over. It was ironic that the Germans started having trouble with supply after their invasion of Russia, when before June 1941 the Russians were giving their war machine enough raw materials to last for ages.
Well, how about not starting WWII at all? If Hitler had just waited until 1945 when the German military planners said they really could roll over the world the Germans would have done better (imagine a tricked out German fleet in the Baltic, with 3-4 Bismark class battleships and aircraft carriers, with subs running amok everywhere). Would the US have really developed the A-bomb without WWII?