CarlManvers2019
Writers Blocked Douchebag
It's not possible to write a "Battle School" story without making the school staff horrible. The experienced teaching staff who have years of experience in dealing with such things will otherwise handle all the problems and the students you're using as focus characters will have no adventures.
There's two options for "Battle School Adventure" stories. Either the staff are malevolent/incompetent so students have to solve the problems, or you wait until the students graduate in which case you lose your "High School" vibe that you're using to appeal to high schooler watchers. You can try to have only staff-sanctioned adventures like field trips and such but that lowers the stakes, there's the feeling that if things get out of hand the competent staff with handle it so it doesn't work well.
The otherwise completely generic and bland anime Hundred actually takes a mildly interesting third path of not having any educators in their battle school. We never see the inside of a classroom, the student council apparently handles all the logistics, curriculum, and planning, and if there's a headmaster said entity is offscreen at all times.
Not really a fan and I stopped reading more than a hundred chapters ago, but I think My Hero Academia handled their teacher-level-competency quite well