Soviet Union wasn't called a superpower for nothing. USSR had many world class achievements in scientific and applied areas, and some organizational achievements in social and manufacturing areas. There are examples and counterexamples, but the result is what we have, and while at some areas ex-Soviets were seen as backwards people in early 1990-s, in some others they really brought some positive advancements to the West - or First World - when the borders became open.
Case in point: The reason why the US heavily relied on Soviet rocket engines for their launches for ~15 years (before SpaceX dominance) was because they were simply more advanced and cost effective. Material science apparently was a step above - Soviet scientists were able to create an alloy for use in oxygen-rich engines which was unbelievable to Western counterparts till they visited and had it demonstrated.
This is one example, and there could be many - both where USSR had an edge and where it was behind. I believe here we want to have the overall picture - and that picture was that there actually were some novelties which were interesting on the West, even though in overall quality of life and some associated parameters USSR was notably losing. Or, saying it from another end, USSR wasn't advanced enough to avoid dissolution after - not necessarily caused by - the Cold war, even though it had some achievements unavailable on the West.
Yes, that was what I also wanted to point out here. As in, the set of novelties Soviets had over the West was at least non-zero. And that rocketry happened to be one may be surprising to some of those less informed about space technology.
