I rarely fly anywhere unless I absolutely have to. I've flown a lot outside the country and no other country is anywhere near as bad as the US/TSA. No other country makes you take off your shoes.
I feel like early on, Americans fought hard against TSA security theatre and nothing changed and people kept flying, so it's just stayed pretty much the same.
It's gotten a little better. TSA agent can't harass people as much and have to be nicer since everyone is recording, but everything they do is still worthless. Millimetre wave machines are filled with so many false positives you should just have people roll a six-sided die.