You stated that the Nazis did some good things, but that they also did many horrible things, and used that to show that the good the USSR did was outweighed by the bad. That right there is Nazi apologia, the sheer scale of bad in the Nazis far surpassed that of the Soviets, just like the sheer good of the Soviets far outweighed that of the Nazis, to incomparable levels. Using the Nazis as an "easy example" doesn't prove your point better, it serves as Nazi apologia.
No, Finland did not achieve better metrics at a larger scale, and further I already explained that Finland is Imperialist. It's a landlord in country form, like the rest of Western Europe, and especially the US.
As for how Finnish Imperialism works, through various international loans and overseas production, Finland extracts superprofits off of exploitation of the Global South. To get into specifics of this takes up entire volumes, but you can start with Lenin's Imperialism, the Highest Stage of Capitalism to see how the system generally works, though not specific to Finland.
20 million soviet citizens died in World War 2, and half of their buildings were destroyed. The Winter War does not compare, neither in proportion nor in raw quantity, to the sheer amount of rebuilding necessary. That's also ignoring Finland's history of anticommunism and cozying up to fascists.
The Workers in the Soviet Union were not sent to camps to die en mass. The "ruling class' was the Proletariat. There was Prison labor, but overall incarceration rates, even despite having genuine Tsarists and fascists to contend with, were usually lower than the United States as a comparison. Consider reading Russian Justice.
The Soviet Union served the Working Class. Free, high quality healthcare and education, dramatically lowered wealth inequality, support for national liberation movements globally, defeated the Nazis, provided childcare, large movements in women's rights, democratized the economy, and more.
The notion that there was a "ruling class" that exploited the workers is ludicrous, because they would have sucked at their job given that they dramatically lowered wealth inequality. They walked the walk as well as talked the talk.