The political compass isn't an objective model

The nazis' economy was a shell game of debt, and they were overextended militarily. Their regime would have fallen even if they had won the war. Secondly, the USSR at first joined forces with the nazis until they were betrayed by them, and after the soviets joined the allies, they received massive aid under the lend-lease act. And even with the aid, they still had to rely on human-wave tactics.

saved Europe from fascism

a fascist state fought a war against a competing fascist state. simply being on the side opposing Nazi Germany doesn't magically make your state a perfect divine utopia