Which all goes to prove Hitlers folly invading the USSR in the first place. The USSR always had the man power and political will to defeat the Germans, it was only a matter of blood and time.
Hitler's big folly was going into Russia late in 1941 because he had to deploy forces into the Balkans to attack Greece to get the Italians out of the sh1te. If he had started in spring 1942 he may have had a better result.