My parents favour my older sister more then me help!?

Like you may think this is stupid but I really think it's true they really do favor her more. like for this day on they still talk about the day she was born like for god sakes that happened 16 years ago get over it. Also when she gets mad at me my dad especially will be ready on her side no matter what I do. She is really rude like she will get mad when I try to talk or joke or like play around with her and Always cries for little things and actually starts crying like a frigging baby and my parents will baby her which pisses me off. Also she calls me dumb or stupid if i need her help and say god you don't have a brain. Also when she really pisses me off and I am really like really mad she knows I will get violent and she will keep pestering me that I will come to the end that I will snap and i will fight and because i'm bigger and stronger then her I can take her down in seconds, so she knows what's coming but still I get into trouble by my parents. Also my older sister says why was Nora ever born? that's how much she pisses me off what do i do about her and my parents they don't do anything. (sorry bout punctuation and stuff I am not suppose to be online right now)