Re: Some Little League advice really needed!!
Is your son's coach reasonable? I would certainly hope so, if he is a coach. If so, I would go and talk to him. Even if your son can't understand what's going on, it would be in the best interest of all the kids to learn that they and their parents are behaving like idiots before it's too late. Keep it calm and use all the correct argument approaches ("I feel like...." rather than "these imbeciles...")
Bear in mind that I'm not a parent, and I'm not familiar with the politics of Little League, and I generally think that parents should let their kids fight their own battles. But it sounds like your son isn't quite capable of doing that, and if something isn't said or done, his feelings could end up being very hurt and the kids will be more idiotic than ever. A true coach of children takes on this stuff as part of his job. It's not all about winning at this level; it's about teaching kids about competition, self-esteem and sportsmanship, so the coach dealing with this in an appropriate matter seems not only acceptable but called for.
There is no such thing as a pitching prospect.