Hi there and thanks for your letter
It sounds like things haven’t been great for you at home and that you feel like your parents and brother are treating you badly.
You say you are doing well at school, well done on that. It can sometimes be difficult when you feel that the people around you aren’t encouraging or being supportive of you.
How would it feel to sit your parents down when your brother isn’t there, and let them know what is going on with your brother and how you are feeling?
Your brother shouldn’t be punching you and your parents need to know and make sure this stops. Perhaps you could discuss a plan with them on how to do this.
If you can’t sit down face to face with them you could try writing it down in a letter and giving it to one of them.
Remember you can speak to a counsellor at ChildLine about these options anytime either by coming into a 1-2-1online chat or by phone on 0800 1111
Take care
Sam