I left over a decade ago, but I actually considered coming back around 2024, so I put some research into it. The result was grim.

- I'm now married to a non-American who is not white. We're not confident in the immigration process, to say the least

- Both of us are self-employed; the quote for decent (not good, I mean aggressively mediocre) insurance was very high

- Housing costs in any city we wanted to live in were very high; YMML on this obviously, but it covers a lot of cities

- Any social ill, irritation, etc that was annoying me around 2010 is unsolved with no signs of progress

- Extreme political polarization (actually a both sides thing)

- The rise of aggressive Christian nationalism (very much a one side thing)

- A horrifying pace of growth in political corruption

Everywhere has its bad points and none of these are necessarily worse than a randomly chosen second country. I think the final deciding factor is just vibes; I feel like America is declining, the culture I was born into is warping, and I don't particularly want to watch it happen from the inside, now that I'm already on the outside.