That sounds awful. I'm completely naive to competitive swimming - but that is worse than what I have heard from my clients who are in select teams for soccer, basketball or baseball.
I'm generally a fan of helping kids learn to stand up tor themselves (in typical "picking on" situations) - but this sounds so much more extreme. The team sounds incredibly toxic. I would address with the coaches and pull my child if it did not get rapidly better. A coach is responsible (or needs to consequence) the conduct of his/her team. If the coach can't handle the parents - than the kids won't ever change. Ugh...I'm so sorry for you and your dd. They gives my stomach knots just considering if my kids were facing this.
