I'd love to not live in a country with him, but if I leave, I know the country gets a little bit worse for those who can't leave. This is why I advocate for staying in awful states if you can do so safely. If you leave, then the state gets even worse for the people who want to but can't.
Pretty sure you need to file them so long as you remain a citizen in any circumstances you would need to file them while in the US, you just don't have to pay US taxes on income you've already paid taxes on in your country of residence, up to something like $100,000/year for a single individual.
I don't know if they resolved it, but I also recall it became more of a pain to open a foreign bank account as a US citizen, because they US government was trying to impose reporting requirements on any bank that had accounts held by US citizens, regardless of where they were.
Presumably they could make entering or leaving the country very difficult. So if you have family/friends in the US or ever have a reason to travel back to the country (pleasure or business) you could find yourself saddled with more debt than you might ever be able to repay