My friend is one but wasn't always like that. He was never critical of Russia or the USA and was pretty quiet until befriending some Russian dude in his apt building during the blackout of hurricane Sandy. Now he frequently criticizes and rants about capitalist USA then sings praise of Russia. We keep telling him to go back but he doesn't. He's unfortunately "that guy" in our group of friends now -_-
However there was a smallish wave of political immigration after the 2011 protests and 2014 conflict with Ukraine, and a much larger one since the invasion of Ukraine in 2022. And those people tend to be very anti-Russian-government for obvious reasons.
FWIW when it comes to Russia specifically, I would broadly agree that the problem there is not just the government but the culture as a whole (although we'd probably disagree about the specific things in that culture that are problematic). It is not obvious, though, and I think it always behooves one to be careful when making sweeping generalizations like that and carefully rationalize them.
You’re correct about Russia. And the same observation applies to the Indian subcontinent, where I’m from, as well. And, while you’re correct that each place requires a separate analysis, I would guess it applies to most places people leave.
People’s emotions and tribalism often make them romanticize the places they left. They attribute the good things about their society to the people and their culture, but externalize the bad things about their society. That’s usually self-deception.