I'm not watching a youtube video.
Did they build a system of oppression
No, such a system already existed, evidenced by the famines, massacres, etc that happened almost yearly in China and Russia before the revolutions.
What I'm getting at is that while the post-revolution states weren't utopias, they were far better than what came before. Telling people otherwise only serves to prolong the status quo.
Also they kinda did have a government ready to go in the case of the USSR, the Soviets.
simultaneously shutting down the mechanisms by which workers could have power over their own lives
Except they had and used those mechanisms, as evidenced by the massive improvements to the average person's lives after the revolution.
the absurd strawman that people think he did anything personally
Apologies, typically when I see people doing anti-communism use the term dictatorial, they mean a single person exercising absolute power. Though I don't understand why you'd consider a dictatorship of the working class "hell".