I'm glad I am no longer a professional teacher.
Last year, my wife taught at a school where the principal was scared to death of the parents. Anytime a parent complained about anything, the principal automatically believed the parent and never considered the teacher's point of view.
He often went so far as to remove a teacher if the parents complained.
The results were predictable. Anytime a strict or hard teacher attempted to challenge the class with difficult work, or to impose any sort of discipline, the students would whine to the parents, who would whine to the principal, who would remove the teacher--either by reassigning to another grade or outright dismissal.
The students were very keen to this, and openly taunted teachers, saying they could get them fired anytime they wanted, just by complaining to their parents. The teachers were basketcases, never knowing from day-to-day if they were going to lose their job over a complaint by some 12 year-old.
My wife, who is a strict and excellent teacher in every way, got out of that madhouse by the end of the semester.