Yes well the Russians also burnt all the supplies in their cities as they left. As far as I know the Nazi plan was to take over the major cities and supplies and use them as refuge. Which would have worked. I wasn't saying it was the lack of Italian troops, I was saying it was the Italian troops that delayed the invasion of Russia which CAUSED them to not succeed in the invasion by winter time.
Half the cities were destroyed by the retreating Russians, they other half in battles (Stalingrad ring a bell?).
This into account the ill-prepared clothing. If they had conquered it sooner, they wouldn't have had to worry about the troops freezing. Even if they would have "inevitably" needed clothes that they couldn't steal from the Russians, which many would have been able to, they would have done significantly more damage to Russia and put them on the brink of surrender, which they already were.
Nonetheless, Hitler foolishly sent, what, 4 million troops?, into Russia when it was beginning to freeze without most of them being prepared in the first place for the harsh Russian Winters that had taken their toll on Napoleon's 600,000 troops 150 or so years earlier. Guess what? Napoleon thought the same thing. Only problem was, the Russians knew what he was planning and did not allow for it to happen. Flash forward to Hitler's invasion, you have the same strategy on both sides. Hitler was at major fault for failing to look at that.
In terms of "inexhaustible" troop supply, they lost in an absurdly large ratio of troops compared to the Nazis and would have continued to lose them as the fighting continued. Their morale was absolutely shattered and over 50% of Russia was taken over. I think they were on the brink of surrendering, the revolution had just happened and the Communistic regime didn't exactly have intense nationalistic support at the time I believe.
Yes, for nearly every German that was killed, 3 or 4 Russians went down. The Germans though, had to wait for reinforcements from Germany, while Russians only had pretty much go outside and pick up a fallen rifle. However, the German forces were ultimately taking casualties that simply were not being replenished. The final blow was Stalingrad when around 1.9 million (I think that was the number) Russians, some on foot, motorcycle, tank, and even horseback, surrounded the city (at least what was left of it) and rushed the remaining German troops who were low on supplies and ammunition, and freezing to death. In other words, it was the German forces whose moral was destroyed as the fighting continued.
Also, the Germans may have taken over half of the
European part of Russia, but far from the whole of it (you seem to be underestimating the sheer size of the country). And the Revolution had happened in 1917, Hitler took over in the 1930s. So the Revolution hadn't just happened, it had happened about 30 years prior to the German invasion.