I hate myself because of my sister and I need advice.
Are you mad at her?
Yes, I am very upset with her for not letting me do what I want to do.
It is wrong to blame someone else for your own actions. What do you think is wrong?
It's not my fault, I'm super smart and good looking...
If you blame others the problem might lie with you.  I think it might be helpful to seek professional help and talk through your issues.