They were on the winning side, so they did win the whole war. But as I said, they didn’t do it alone nor would they ever have been able to win without all the help they received from everyone else fighting the Nazis at the same time. I don’t think current events should be a reason to see history differently. The Soviets were a powerful war machine during WWII and their contribution played a huge role in the outcome of that war.

I would like to make one correction. Berlin didn’t fall because the Western forces captured it, but it was in fact the Red Army that got there first. This of course doesn’t change the fact that the Soviets never would have managed it by themselves, but this is the reason why claiming “the Soviets defeated the Nazis” is technically true.