There is no way to romanticize what took place in the East. The Soviet Socialists were monsters and so too were the invading National Socialist monsters.
It's difficult to comprehend the suffering which took place in the East, particularly in those regions where massive pitched battles took place between the two godzillas.
Then there was the partisan warfare; pro-Soviet, anti-Soviet and mixed groups of assorted criminals and deserters.
For the civilians in those regions, it's probably best to not know too much about what they did in order to survive.
My sense is that Russian demographics are so bad today due to the fact that they lost so many people during the war.