@tboard. Russia has almost 150 million inhabitants. (This includes e.g. children, mothers, elderly, disabled people.) You really think it's doable that a large amount of them just move away? It's hardly imagninable to foresee all the consequences this would have on a large scale. (Think of education systems, food supply, ...)
Also russians are currently not really the most liked people world-wide, so not sure which countries would be willing to let a large amount of them into their country. What works for a small group of individuals cannot simply work on a large scale.
And regarding the question, why people would want to live in an oppressive regime.. Simple answer: They don't. They are either not aware / not aware enough of the oppression/evil of their regime (you can call them stupid and deny propaganda but propaganda is a real thing that works), or they are aware but don't care enough in the context of other things they would lose. People do not only care about freedom, but also a lot about general security, food supply, a warm home, social contacts, etc. If everything works except for freedom, people will often choose the safe bet and I don't blame them.
But the main thing: The question whether you want to live in a dictatorship or not is not a real question in such dictatorship, that's not how dictatorships work. It wouldn't be an
oppressive regime if you were asked your opinion. Look at North Korea or some African countries, I am sure people living there do not want to be oppressed but they simply cannot choose or simply move away. If anyone thinks that people
just need to stand up, then I suggest to study more history and study how power structures work.