The doctor’s appointment is not a great example for the US because the system is so fucked. If the doctor is terrible, sit it out, and then request to never see them again. You don’t even have to say why (if/when the scheduler pressures you, just blame the free market: “my care will be better managed by someone else”). Because if you don’t like your healthcare in the US, you certainly can leave, but you will be stuck with the bill, and if it’s considered leaving “against medical advice,” you will be denied insurance coverage if you return for the same issue.