The polls quoted are not representative because of the demographics change. The oldest part of the population, who grew up after WW2, prefers soviet union, but it's because it was their youth. Their children, who spent most of their lives in "developed socialism" are much less happy about it. Young people, who grew up in independent states, are overwhelmingly against soviet baggage. And since 2010, when some of the quoted polls were made, older people died.
The only ones who actually regret the decay are russians who morn loss of their empire. Soviet union was just another incarnation of it. Also serbs and hungarians who are a bit isolated in their space.
It is especially strange to see this comment while ukrainians, one of the largest postsoviet states, overwhelminly support and enact literal fight against russian restorational imperialism which tries to bring russian-dominated soviet state back. Or are you questioning this proposition too?