Flying Dublin to US was incredibly backward. First you go through Dublin airport security, then you walk through a beautiful terminal, lots of food, drink, etc., so you grab a bunch of drinks, maybe a sandwich, unaware that you are about to have to throw it all away because you have to go through TSA and US Customs once you reach the "American" terminal.

So after throwing away perfectly good food and multiple bottles of water because our flight was coming up, we then had to sit in a terminal that only had 2 snack choices and no real food offerings.

I've decided to never fly out of Dublin to the US again. Even if that means I have to fly to London just to transfer to the US.

Most airports in Canada work similarly when flying to the US. It's actually an advantage because you go through US customs on departure and can fly into any US airport, even smaller non-international ones that don't have customs.