Austin airport is ok, they have salt lick bbq, but that’s about the best thing I’ve had in an American airport.
In Spain recently I had one of the nicest Spanish ham and cheese sandwiches I can remember.
In the USA and Australia food feels more like a business, in my opinion in the flag ship European counties decent food is a right. Japan is similar too. When I’m in the USA I hang on review sites because it’s so hit and miss, in Tokyo or Barcelona I’ll happily just walk around and try random places.