the best way to deal with a bully is to punch her/his lights out. the schools should have a martial arts / mma trainer on staff. whover gets bullied has to take classes with martial arts / mma fighter until they can hit the bully hard enough for her/him to eat through a straw for a month. this is the way.
This worked for us. A little thug was bullying my kid until I taught my kid how to land a punch to the mouth. That was a one-shot solution to that problem.
Obviously that isn’t a universal solution. It’s worth evaluating the option, though.
You think that a child being bullied should have to suck it up until they commit forced violence against another child? Maybe beating up a bully is something that happens when adults abdicate all responsibility, but it's insane to claim that's better than "the adults should just do their fucking jobs".