@Gentlegamer I think your buy is too aggressive.
That’s how I roll, baby!
The idea is to defend while preserving the ability for strong counterattack. You want to be trading territory in Poland, not the outskirts of Moscow.
You gave an example of a huge stack of Soviet infantry failing to defend Moscow and a force infantry and fighters being able to resist conquest. This is sound; but if you are at the point of defending Moscow that way, you have already failed, in my opinion.
Perhaps you are working a war of attrition on behalf of the Allies, but the key to victory in the European theater is putting Germany on the defensive.