The popular story is that America was built by immigrants and that, therefore, everything about immigration is good and leads to a more successful society. This narrative is so devoid of historical context that it should embarrass anyone beyond a second-grade education.
The quality of life of European cities and towns of almost any size make life in America look not just like a joke, but a sick joke, a horror movie. But I'd rather stay involved and do what I can to make this a better place than move to the south of France and enjoy the good life.
Life in the mid-21st century is going to be about living locally. Be prepared to be good neighbors. Be prepared to find vocations that make you useful to your neighbors and to your fellow citizens.