wow, I bet when your sister gets older she'll really appreciate seeing all you've said about her. With the OP, tl;dr, but I know it isn't very brotherly to complain about her and call her names behind her back. Anyways, I imagine I'm probably one of the only people here who actually like their older sister. lol
Edit: now I read OP, and boy you have a piece of work o_o Sorry about having someone act like that all the time. The only advice I might give is that maybe if you act a little nicer to her, she'll do the same to you.