Very true, I agree. Not trying to claim the customer is always right (lol), just that when preparing someone's food I feel there should be a bit more turning the other cheek when dealing with rude customers. It certainly sucks, I've been there, but I don't think doing something to their food is a good response.
Eh. It's been a minute since I worked even retail-adjacent, but nothing I've seen leads me to believe people have learned to behave themselves better in the interim, and especially not after the pandemic.
It'd be one thing if I could blame The Youth, I suppose. But mostly what I see is people my age and older, acting in ways my mother did not tolerate in me by the age of five, nor need; I had pretty well learned my manners by then.
I could credit an argument from incapacity, although I would find it as frightening as compelling. Other than that, I see no excuse, and I also had to learn young the sovereign counterargument to a bully. To see it applied in so extremely indirect and gentle a fashion, and in cases where some response evidently is due, outrages me not even slightly.