I always laugh when an older person in my family talks about "giving that person a piece of my mind" like it's 1980 still and your can shame some 22 year old waitress or checkout clerk into giving you better service. It's more likely that person will punch you or just walk out the door and quit than "work better."
I just expect bad service everywhere now and don't get stressed about it. Anyone who has traveled enough to Italy, Spain, or France knows the deal. The US just has the same vibe now. When you go into a cafe in Italy you expect to be left sitting for a while before anyone comes by, they may screw up your order/bill, and the kitchen/bar may be out of things. They don't care about your complaints either. People there are used to it and stay chill. Enjoy the scenery and conversation.
Imagine renovating a house in Italy or Spain? LOL
Anyway, that is coming to this country.