If you work a white-collar job the US standard of living is substantially higher. If you're a laborer the opposite is true but you also probably have a harder time getting in to Europe in the first place.
I suppose healthcare is a major issue for me due to my disability. When I had to get insurance on the private market prior to the ACA I had to go in the high risk pool, which was stupidly expensive even as a SWE. I hear it's better now but every year some Republican gets the bright idea to try to repeal it. I fear with enough of a majority they will.
I immigrated from the US to another country a while back, and it's not unusual for me to meet newcomers with unrealistic expectations about life in their new home. Often, they go back to their birth-country after a few years, disappointed with the mundane reality of living in a foreign country.
I'm not trying to say that your wrong, necessarily. For some people, life can be better in other countries, but I caution against unrealistic expectations.
I'm much happier here because of the reasons you mentioned. I feel like my friends in America have are basically amassing wealth to insulate their liberal bubble in a conservative land. However, they might not be able to outweath the recent success of right wing policies that the American supreme Court has managed to impose.
For me personally, even the "low" tech salaries in Europe (think something like 150k an year total) is more than enough for the lifestyle I desire. If amassing wealth isn't your primary motivator, it absolutely makes sense to move to a society which better aligns with your values. That would probably be the EU for someone like you and me, but UK is EU lite.
I love that everybody here has the same access to healthcare and the fact that my high taxes help that. I like that the population responds to the actions of the elected officials - like how the current UK govt is doing absolutely terribly in current polls. In the US, it seems like it's always a tight race regardless of what the government does. I love being able to use public Transit to get to most places. I'd rather my potential kids grow up in a kinder society, where their wellbeing wouldn't be at risk if something were to happen to me or my job.
In the US, the time from Green card to citizenship is unbounded. people from India and China are pretty much never going to become citizens till they exploit some loophole like having an American baby.
Iirc you can indefinitely keep getting renewals on your h1b while waiting on the green card queue - and this queue is many decades long for people from certain countries like India and China.
In my personal experience, there is also less stratification and less overt racism or bigotry. However, they're pioneering new and clever bigotry against trans people now and that concerns me.
Sure, and the Conservative Party, who has enjoyed a very long period of uninterrupted rule, has been gradually sabotaging it with the obvious hope that is falls apart and market reforms can be implemented. Most of these differences have more to do with the legacy of the post-War period than anything about the current political situation.
The UK is also significantly whiter than the US is, which is something of a counterpoint to the idea that they're less bigoted, in my view.