When we were in college, out of the 100 points for evaluating scholarships every year, academic performance accounted for 70 points, and peacetime performance accounted for 30 points. The usual grades are graded by the class teacher. What is the result? All kinds of student cadres who have a good relationship with the head teacher get full marks, while our academic performance is very good, but our relationship with the head teacher is average, and we can only get about 20 points at most. In this way, I could have won a first-class scholarship, but in the end I could only get a third-class scholarship. It was unfair and exciting at that time, but we didn't do anything at that time!
It's different now. You should complain to the school about this irresponsible head teacher (and leave school again)!
Wish you success!