I'm not comparing them. I'm saying that doing something good does not mean that the instance that does the good is also good. The Nazis are simply the most extreme example that can be found, and therefore the most efficient way to show that the concept of "doing some good things does not automatically mean you're a good guy" exists in general.
They doubled life expectancy, over tripled literacy rates to 99.9% from the low 30s, dramatically reduced wealth inequality, provided free and high quality healthcare and education
And the only part of the Russia that did not become Soviet did the same things in an even bigger scale. Why?
Finland funds its safety nets through Imperialism.
The eastern block got money from Moscow through Warsaw pact. The western block got money from Marshall Aid. There was only one country in Europe that received neither: Finland. We were considered to be in the eastern block, so we were not allowed to get Marshall Aid. And USSR's aid required accepting that "if the country's independence is endangered, Moscow can choose to send its forces to help". We demanded a change to that rule so that Helsinki decides if the help is needed, not Moscow. And then Soviet Union said, "okay, no money for you people, then". Soviet Union got reparations from Germany and Finland. Finland paid all of its reparations, fully. The last payment was made in the 1990's. While being the only country not getting any money from foreign countries for rebuilding after the war, we also paid huge war reparations to the country that had begun the war in coöperation with Germany by attacking us in 1939. And yes, that does mean that the advances Soviet Union did after the second world war were partially financed by Finland. Which still managed to do better than Soviet Union it was helping. Could you please tell, how precisely does all this mean that Finland was funding its safety nets through imperialism? Was the Finnish imperialism visible in the huge decrease of Finno-Ugric population, from whose colonized territories Soviet Union got almost all of its oil and minerals? Or where did the Finnish imperialism physically take place?
Finland saw no such comparable devastation
During just three nights in 1940, Soviet Union dropped 16489 bombs in Helsinki alone. How is that not devastation? And of course those were only the most intense nights of bombing, there were of course maaany more of them between 1939 and 1944.
The Soviet Union existed for the workers.
The Soviet Union said that it exists for the workers. But the workers were who got sent to the camps to die, not the ruling class.