I'm surprised no one has mentioned GRU

The lines are always insane, even in business and first class. Security is evil. They are completely inconsistent and have taken my Purell (supposedly I could light it on fire and bring down the plane ) and nail file on different occasions even though I've flown with both through there a 1000 times.

There are no decent food options, the lounges are over crowded (both DL & AA) and often have poor air-con

All in all, I HATE GRU