I don't like having an autistic brother?

My younger brother is 10 and was born with autism. I'm not saying I hate him but life with him is really difficult. He misbehaves alot, and is mean to me and my cousins. He recently learned the F word from older kids in his school and has been saying that to our cousins. My cousins find him really annoying, mean and agressive. But all his teachers see him as an angel in school. I have a cousin who is 9 and he can get along well with his older brother and sisters who are 18 and 17. They can talk about anything, like games or other stuff. While I can't get a conversation with my brother because its really difficult to communicate with him. I don't have an older sibling but I wish I did. My parents aren't punishing him properly when he misbehaves. They say stuff like ' behave or no computer for a week' that's it. Because of him I can't go out with my friends or even do anything personal because my brother would want to do the same thing and get distracted. So my mum will tell me not to go out and stop whatever I'm doing. Once I had a swollen eye, and my mum still made me go to school for exams. I couldn't even see properly since it was my right eye that was swollen. I still go to school when sick while he doesnt. I know he has special needs, but it doesn't mean that we should be treated differently. Its not fair, my parents always put the blame on me. I really wish I had an older sibling but I know I can't. What should I do? Thanks.