While the leaders of airline businesses and airport authorities will swear on their lives that "the customer comes first" and they will be supported in this assertation by various
PR and marketing types, the reality is that the majority of the airline/airport employees have you well down on their personal priority list.
They don't care where you live, who you are (unless you're their boss of course), how much you spend or how long you've been flying with them. They don't care if you foam at the mouth and tell them that never again will you fly with their cursed airline! Further, you have absolutely no chance of winning an argument at an airport, indeed, you could end up being nicked for just raising your voice in a way that .."upset my colleague..". The only outlet for your frustration is a letter to the chief executive or venting your spleen here on Pprune.
However, neither of those will change anything either.
My advice? Either rise above it all or take every opportunity to stick-it to the guy next down in line from you in the pecking order....