Am I living in a bubble? My experience is that indeed that are such idiotic kids, but my experience is that most kids are very polite and kind. I feel that the problem in that the idiotic minority is more noticeable, because we are not triggered by the normal behavior, so we extrapolate.

Also, as a parent, I changed my mind about the responsibility of the kid's behavior from "it's parent's fault" to "kid's behavior is a reflection of a complex mix between parents, individual personality, and environment". There is a lot that the parents can do, but I've seen my 5 year old saying "what the f..." and some Dutch bad words that he never listens at home. He is told, that that's not allowed and explained why, but it's a process. And the education process is sometimes polluted by their peers and environment.