Not GP, but I have American friends/acquaintances who have decided to raise kids in Sweden, The Netherlands, and Germany due to issues (either real or perceived) with the US.
I mostly think people with money in the US are unlikely to have much different quality of life than developed European counterparts, though. It's mostly people with fewer resources that are disproportionately worse off.
Even the seemingly wealthy or middle class still conduct crowd fundraisers for critical medical care, funerals, etc. We helped another American friend with one of these recently.
Just this week, a friend who is middle class with chronic but manageable health problems was expressing serious intent on leaving the U.S. precisely because of long-term bankruptcy from medical cost prospects.
The worst thing is that the incentives are perverse. Your chronic pain friend can easily cost a society more than they will return in value, but if society will not take care of its feeble and weak than what value does it have?
If your friend emigrates, they may put a burden on the country they go to. Even if they are productive, the cost of their ailment (assuming its not just ridiculously ovepriced medicine in the US that is in reality really cheap everywhere else, in which case the nation he immigrates to should be overjoyed at the opportunity!) can slow economic growth over if someone with no ailment and the same qualifications emigrated instead.
So the US "sheds" a "cost center" and another country takes on the burden. American companies keep turning over record profits and stock valuations while its poor and sick suffer and die, while other nations are burdened with those America should have taken care of itself with its vast wealth if only it had any morality to care about its citizens.
In the middle / upper middle class of America, you are likely to have a much higher time demand than in Germany / Canada / France / Europe. Checking the government's mandated annual time off shows that Germany has 29 paid days off per year, while Canada has 16-30-the US has 0 mandatory paid days off per year.
While you probably have PTO in the US, the typical leave is 2 - 3 weeks, many companies will offer unlimited PTO to further obfuscate how much time you are expected to take and avoid PTO payouts.
I mostly think people with money in the US are unlikely to have much different quality of life than developed European counterparts, though. It's mostly people with fewer resources that are disproportionately worse off.