Why does my sister gets everything?

Just hang on until you're old enough to move out and then get the hell away from them. Take it from another "second-best" sibling -- there is nothing you can do and it will never get better so just chalk it up to sh*t luck and move on. It took me until my late 20's to admit that my parents will ALWAYS kiss my sister's @ss and treat me like crap. I don't need them so they can continue acting like she's perfect but I won't be around to be nauseated by it anymore.