What to do if I believe that my sister doesn't deserve happiness?

Hey all! Here is a problem: I have a sister who is two-faced b@tch, people think that she's nice but it's only a facade. Before plastic surgery she was a real sweetheart but after thee surgeon on her nose she became unbearable: it's impossible to have a discussion with her she will always push only her opinion because she sincerely believes that she knows everything and she is always right.

Moreover, she occasionally gives comments on my appearance and I don't even ask for her advice but she thinks that she has to say things about my nose, hair, ears etc Even though I beautiful and have been told that I am pretty many times before. Of course, I defend myself but somehow I end up being a bad guy.

She is getting married soon and I believe that she doesn't deserve happiness as she is a very bad person. I understand that I am jealous as she is a younger sister and getting married soon, but I don't understand if she is a horrible person how could she be happy so soon and I am. a good person and I just recovered from abusive relationship. by the way right after I broke up with my abuser and shared this story with my sister so that to protect her from common mistak in the future she told me that she will not be that stupid to get into such relationship, even though it wasn't my mistake that a guy was a narcissist.

Overall, I don't know how to handle this situation, I know that being jealous is bad but I can't feel ok with such injustice. Could you give an advice how to handle this situation? Or maybe you were in the similar situation then please share how you handled it.