Yes, there is plenty to say, actually. You could, for example, stop pretending that you actually do care about the well-being of Ukrainian people, since you apparently have no mention of the millions of deaths from destruction of public healthcare, alcoholism, drug abuse, violence, suicide, shitty diet and outright hunger that took place after 1991 and kept happening as Ukraine became the poorest country in Europe. You could admit that you only care about Ukrainians suffering now because the war happens to be against the geopolitical enemy of your country.
The hardliners of the communist party prevented the needed reforms to prevent the chaotic collapse of the Soviet Unions, which would have prevented, or at least mitigated, the "millions of deaths from destruction of public healthcare, alcoholism, drug abuse, violence, suicide, shitty diet and outright hunger that took place after 1991". And if Lenin hadn't betrayed the revolution, we wouldn't have had the Holodomor. The Soviet Union fucked Ukraine first through malice, then through incompetence.
If you gave one flying fuck about the well-being of Ukrainians, you’d be supporting communism and the Soviet Union right now, since its disintegration led to the worst humanitarian crisis the country has seen since the Nazis invaded it, and to an ever-ongoing disintegration of public services which led to millions more premature deaths than the illegal Russian invasion. You would be complaining about Russian capitalism which is the one that invaded Ukraine, and you’d understand that there was no such war during Soviet times. It is precisely capitalism that brought all of this to Ukraine, and if you cared genuinely about Ukrainians and wished the best for them instead of using them as a pawn for your media-induced hatred of Russia, you’d wish for the USSR never to have fallen.
The one mostly responsible for the collapse of the Soviet Union is the communist party of the Soviet Union.
You’ve shown us in other comments that you’ve done no reading on the topic to the point that you don’t even bother to understand the difference between income and wealth, and you make up on-the-spot assumptions from your ill-informed, poorly-read, west-propagandized version of the topic. The problem isn’t that you do this, the problem is that you do this while claiming to be a leftist/anarchist. I’ll tell you something: if you, as a leftist/anarchist, share 90% of your opinion about a geopolitical enemy of the USA with the CIA, you’re doing something wrong.
At least I'm coherent, unlike you. The fault for the collapse of the Soviet Unions lies by its incompetent government.