My mom works as a teachers aide in Illinois and her district has assigned her to the worst teachers a.few times, because they know that she will not tolerate the teacher mistreating the children and she will report it. Then they can document a case to get rid of the teacher. It takes horrible, gross violations for a teacher to be dismissed.
Part of her job is to accept all the inneffective strategies and laziness of some of these teachers, no one wants to hear about that. But whenthey physically or verbally hurt the children, she ends up documenting it. It's awful. (Actually, teachers must freak out when my mom gets assigned to their classroom)

When my son was in school,his best teachers were actually brand new ones. I love those teachers and appreciate their dedication and honesty.
My mom, being assigned to the worst teachers in her district, has a whole different viewpoint.