> I think the Vlasov army was totally killed.
Yes, but most Russians are still not punished for their crimes like Crimean Goths. Moreover, they openly wear fascists symbol: ROA flag, and Russian Eagle is surprisingly similar to German Eagle.
> USSR was brutal. World War 2 was extremely brutal - they lost 30 million people
USSR lost 12 millions in WWWII, fighting Poland with Germany (1939), Finnish, and Germany with England and US. Losses are raised to 42 millions to hide 30 millions Ukrainians killed during Holodomor (7 million adults and 23 million children). RF accepted number (02.04.2008) is 7 millions only, but they are still hiding them in WWWII losses.
> USSR was pissed at how rabidly some Ukrainians and others killed people when they sided with the Nazis.
Guess what? If you kill millions of Ukrainians, they remember that for a long time.
Anyway, Berlin was taken by First Ukrainian front and Second Ukrainian front. No Russian army was involved in the taking of Berlin, because Russian Liberation Army (ROA) was on Nazi side.