Is it normal to wish your sibling was not your sibling?

My sister and I don't have the usual sister relationship but were trying to be cordial. However I can't stand her flaws. I know you shouldn't define a person by their flaws but I can't help but put the negatives over the positives. She's so competitive she can't be happy until she is better than someone else it's so annoying ! Because her jealousy can get in the way of us just being fine with each other but no if I do something she has to do it better than me or doesn't even go along congratulating me. People have always complimented me on having a nice body for example and she doesn't go with it she just smiles and goes off to work out. Never once have I heard her give me a compliment except of something she is not competing with. She's stupid and insecure I don't like people like that so I usually just walk away from them but I can't from her cause she's my sister and have to deal with it forever and ever ! She's also so sensitive my family and I get annoyed of it so if you confront her she starts being so stubborn acting like she never does anything wrong. So when I confront her about this she has this smirk like she's not doing anything wrong. However her bf has confronted her that she can't do something to someone think it's okay but if others do the same thing it's not okay and she apologized like a little b*tch but she won't listen to her family? She doesn't wanna lose him that's why and if I tell we that she's gonna go crazy and I don't care if she goes crazy but I do care if we don't get no where and that's what usually happens.