I despise my sister
What makes you feel so strongly about her?
I hate her. I'm so much better than her. She's the reason I have no friends. My parents are always worried about her. My parents were always worried about her. It makes me sick.
It is common for siblings to fight, which can lead to rivalry and hatred over time. Communicate with her and see if you can find some common round so that there are no rivalries between you two.
You forgot to say that I have to spend time with her to prove that she's the worst player in the world.
I think that sometimes it is just hard to get along with your siblings. It is understandable that some people just do not get along