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The most frustrating airport I've been in recently is Kansas City (KCI). It was probably a lovely airport once - it's arranged in a half moon shape, and even though the facilities are limited, it was nicely designed for pre-9/11 flying. Unfortunately, that's not the case any more.
Each gate has its own security line. If you wait before the security gate, there's no place to sit, and the security guard hassles you if you sit on the floor. If you wait after the security gate, you can't get a drink of water. At least there's a bathroom - I ended up sticking my head in the sink bowl and slurping from the faucet because I was so thirsty and there was no way to buy a drink once you went past security (and of course, it's too dangerous to allow a water bottle through the security line).
This is my biggest frustration with many American airports. So many of them were designed before the current security situation, and there's very little once you get past the security stations. Maybe one noisy sports bar and a kiosk where you can buy candy and soft drinks. I'd rather deal with the ugliness of Atlanta, where at least you can get a meal after you pass through security, than deal with JFK, which may be pretty, but at least in some terminals, there's absolutely nothing available once you go through security, especially during off hours.