Maybe it isn't.
I just have to deal with his snobbishness, rudeness, disrespect, and everything because if I don't then my parents will side with him and I get in trouble. He's only 11 years old but he's already cursing at me, treating me with disrespect, and completely ignoring my feelings. When I was younger I would just beat the sh*t out of him and I didn't care if my parents got mad but I guess it started to pile up because they accuse me of everything involving my brother. I'm still deciding whether a good ass-kicking is needed, and whether it would be worth it for me. Help?
For now, it isn't "worth" it to beat him up and get in loads of trouble. Try and ignore it. Listen to headphones and avoid him. If your parents blame you for stuff, point out that he's as much to blame for his attitude, but say it in a calm voice. Try to be passive about things, and let your parents see that your little brother is doing something, so that they'll side with you and he'll be in trouble. Not you.
It's worked so far with my nephew.
But most importantly: Don't get angry. Don't yell. Don't threaten him. Just go calmly talk to one of your parents or wait until one can talk to you.