This is not a US-only airport staff issue. I am on the road most of the last three decades and it is international. It is one, binding "quality" in every country. Most the airport staff's core competency rests elsewhere in almost all airports.

I am hedging because i have had nuggets of exceptional service and support here and there, even in nightmarish hellscapes like Heathrow. Flight attendants are a whole different area of joy and fears...