Stalin is a conflicting historical figure, who is neither a monster nor a savior

His one and only redeeming deed was that he finally, eventually, only after being stabbed in the back by his former ally Hitler, fought against him by throwing millions of russians at them and thanks to US support managed barely to win.

In every other way he was a total monster, directly responsible for an amazing amount of human suffering that still lingers today in modern day Russia. If Communism had something good in it, Stalin personally ruined it for pretty much everyone for a long time.