Kids hate going to public schools because of how it looked like prison camps.
They perceive it that way because of the poor environment/atmosphere, rude staff, restricted freedoms, mandatory dress codes, preposterous rules, and how it teaches them the cruel reality of living in the society once they grow up.
Sometimes the bully always wins no matter how much you fight for what’s right because they are protected by staff mainly due to being either a child of a corrupt politician or the higher authority that runs the whole school is a natural asshole to society.