I think its good...but I worry that the HBO show is not imparting the right takeaway message... people leave just thinking that nuclear power could be bad or that impending climate change is the next disaster. (According to the shows liberal creator.)
Not about the roots and evils of the Soviet system and why it collapsed.

I'm curious if you actually watched the show. Because what I got from watching it was that the problem was not nuclear power in general, but how the corruption and dysfunction of the totalitarian state created an accident that never should have happened.
The climax of the show was Legasov's testimony at the trial, and he specifically noted the differences between how the West designed and operated its reactors, and what happened in the Soviet Union.
Overall, the show was a searing indictment of the Soviet Union.
I dont agree with this assessment of the HBO series, probably the single most prominent theme of the series was the evil incompetence of the Soviet system and socialism...how that system was uncaring for the fate of its own people and how it shrouded the truth of the situation from all except the Central Committee.
It was a condemnation of socialism that was not sugar-coated in any way, and any knowledgeable and free-thinking person in this country who saw it could not miss the (probably unintentional) similarity to Leftist and Democrat propaganda and action (such as the Mueller KGB-like prosecutorial and investigative tactics) that we are seeing in America since Trump upset their plans.
Speaking of which...
"Citizen X (1995)- Based on the true story of a Russian serial killer who, over many years, claimed over 50 victims, mostly under the age of 17. In what was then a Communist state, the police investigations were hampered by bureaucracy, incompetence and those in power. The story is told from the viewpoint of the detective in charge of the case."
An excellent movie.
The relevance is the Soviet bureaucracy and their refusal to accept that 1. A serial killer could exist in the USSR... and 2. The killer is a Communist Party Member.
Meanwhile, people keep dying.
"8 years. 52 victims. 1 killer." HBO Films
The Soviets were really just Democrats. Seriously.