Let's see, in the USSR story we have two sides.
One claimed they did the best they could and the people who got repressed deserved it, as evidence for that we got archival data with criminal cases. That's the side that brought education, medicine and quality of life rising at unprecedented rate for all.
Other claims that they just genocided gorillions for no good reason to hide the fact they're bad at basic economics, as evidence they present testimonies and anecdotes by former aristocrats and businessmen, orthodox christians, billionaire owned newspapers and Joseph Goebbels.
That's the side that left us with economic crises, poverty, right wing dictatorships, with AIDS and heroin for all who can afford it.
I don't know who to believe to be honest.