I haven't watched a ton of youth sports in the last 20 years (and only baseball and football), but have seen some outstanding parents and kids and some not so outstanding. Far too many parents, coaches, and kids think they are the best out there and nobody can tell them how to behave. I did coach some kids (twins) many years ago who were universally disliked by their teammates (and coach). That was hard, but they did play nearly every inning because they were pretty good and there was no way of getting them to not be mama's boys...