Interestingly, the fall of Soviet communism is perceived (significantly) more positively in most Eastern European countries [1].

While I do not deny the influence of economic inequality and capitalism or the other factors mentioned in the article, my experience with Russians shows that nationalist/imperialist beliefs and the desire to be a superpower carry more weight when it comes to regretting the dissolution of the Soviet Union.

[1] https://www.pewresearch.org/global/2019/10/15/european-public-opinion-three-decades-after-the-fall-of-communism/