I hate my sister so much that I am obsessed with being the good child in the family.
Is there something I can do to help with your feelings towards you sister?
Thanks but no. I want to enjoy the joy I can get from being the "good child"
Having a period of sibling rivalry often occurs in a family while the kids are growing up. A small degree of it is normal and expected but getting to the point where you hate your sister is wrong and indicative of a larger problem. You should try to resolve the issues you are having with you sister through discussion rather than trying to put her down by outcompeting her in all aspects in life.
I'm just fine. I just used my brain to get that great idea of being the better child. My sister doesn't have a brain so it's just natural that I would be better.
That's such a wrong way to look at your sister! If you really want to be the better child then start by treating your sister better.