My younger brother said the most hurtful thing today

I can’t verbalize how bad I feel today. My younger brother (17 years old), without any reason, tends to provoke me into fights and irritates me to no end. Lately, I have been trying to stay calm to avoid any kind of escalation, but today he crossed all the lines.

Early in the morning, when I woke up, I was obviously yawning and stretching, to which he said, “Kya awazein nikal rahi ho? Tameez se raho” (Why are you making those noises? Behave properly) in a really disgusting tone. I told my mother about it, but he manipulated her by saying, “She was making noise, that’s the only reason I said that.”

He then got very aggressive and said such demeaning words to me that I could barely process them. He said, “Tumhare jaisi ladkiyon ko isiliye belt se maarte hain” (That’s why girls like you are beaten with a belt). After that, I went to the terrace to avoid any further communication with this nasty person, and he locked me out there.

When my grandfather questioned him about it, he simply brushed it off by saying it was a mistake.

I just can’t deal with this person anymore. He keeps following me around the house and picks fights with my mother. He never admits his mistakes and always tries to suppress me and my mother if we call him out on his actions. He outright blames me and my mother for everything.

The brother I was once so fond of has turned into this obnoxious person I don’t even want to associate with anymore.

Edit: He went to school today and has carried a good amount of money with him. It is my parents’ fault that he has an access to it at such an age.He said to my mother that he will not return.