Mad as hell and not sure what to do about it (parenting a 13 year old girl...TW: weight/size issues)

My daughter had a really shitty day at school yesterday. A good part of it she shared with her father and me, and that was all incompetent/idiotic teachers. e.g. A creepy male teacher who 1) doesn't bother to learn the kids' names (especially the girls) and 2) tried to tell her that if her parents paid her $10 an hour…