Why do I hate school?

I'm thinking that the school itself isn't what's bothering you. You may not appreciate the challenges (which bring success), but you need to learn how to deal with it all to succeed. You will never grow if you cannot learn about the world.

Is there someone who is intentionally bothering you? Ignore them, fight back, or report them to authorities.

Are you not learning the material satisfactorily? Get a tutor. Ask for help.

All the issues that could possibly affect you in school are not as important as basic education. Your sharp pain is unnecessary...you are worrying about self-growth. Trust me: you cannot be a child forever.

well if you expect to survive in life. You might want to change your hate into deep respect for the place and the teachers that are giving you your education