I don't think many believers "got through it OK;. millions died!!!No. The Soviets also had an irrational belief system which I reject, but the Orthodox church got through it OK. I'll be out with my Russian friend tonight, btw. I trust her accounts more than yours.
All depend how old your Russian friends are. Since the 80s, communism was going soft.
But those who experienced the 50s and 60s will tell you if it was a bundle of fun.