I was a monitor in the university for four years. This has happened before. You can discuss it with the counselor or with other class committees that support you. You can't take yourself seriously in the position of monitor. We should always listen to the opinions of the class committee. Since the school board opposes you, it proves that you also have your own imperfections. If you think you are right, you must get the support of most of your classmates and explain the situation to him clearly. If he still wants to object, then directly vote not to let him be an academic Committee member. Anyway, try to be flexible and don't hurt the unity of the class too much. It is necessary to discuss this matter with the counselor.