Much of what you're claiming is undermined by the fact that the vast majority of Soviet people voted to keep the USSR. How could that have happened if people had no say in the government, and if the SSRs were just colonies? It's also undermined by facts like the early USSR letting some former Russian vassals become independent (e.g., Finland), successive Soviet constitutions granting more and more power to SSRs and national groups, and the steady rise in living conditions under the USSR/the sharp decline in living conditions after its dissolution.

And if you're serious about applying those same standards to every country, you'd see the U.S. as one of the most evil countries in the world. Our treatment of black Americans and American Indians was literally a model for the Nazis, and eclipses the scale and severity of even the most fevered anti-communist propaganda. We've fought wars of aggression all over the Global South. We've strangled popular anti-colonial movements in their crib and kept them down by backing murderous dictators. We illegally monitor as much of our citizens' communications as possible, have extrajudicially assassinated opposition leaders, have attempted to blackmail opposition leaders into killing themselves, violently repress even peaceful left-wing protests (while providing police escorts for Klan rallies and Proud Boys), hell, the Chicago PD was running a black site torture operation.

But I'm guessing you don't take that part seriously, otherwise you'd have questioned whether such an evil country -- that's militantly opposed every communist movement since before the USSR even existed -- is a reliable source on the shortcomings of communist states.