German army mostly found that Union had more soldiers than they had bullets, and that wehrmacht got to Moscow on the fumes.

The "massive industrial advantage" was nothing not to be expected from the most resource rich country on the planet.

Yet, the country was, by all accounts, from both most staunch communist party sources, and contemporary anticommunists, completely incapable of running during the crisis, and "all in" strategy of manufacturing one gun, one tank, one shell, one plane in massive amounts was a result of desperation, not industrial might.