Growing up with big sisters is fun. There's always someone to play with. Someone to watch your back. Someone there when nobody else is around. Then there are times when you feel inferior to them because you can't meet the standards that your older siblings set for you long ago. Standards that were never yours in the first place but you feel like you have you have to meet anyway, and if you don't you a failure. Standards made by a different person in a different situation. Then there're times when you just feel like you can't talk to them. Like there's this barrier in between you guys. Like there's a separation keeping you apart and it makes it hard for you to communicate because you feel like they won't understand or make fun of you because you don't like what they like or, do what they do or, your friends are nothing like their friends. It kind of makes you think there might be something wrong with you or, that you're the problem. In reality, you're just two different people. There's nothing wrong with not being exactly like them. Being your own person is good. Don't let your parents decide whether or not you're as good as your siblings because it's not their decision it's yours.
They can't decide if you're good enough because they're not you. They're not living your life or experiencing what you're going through.
They don't know your struggles or hardship because they don't have to live it on a daily basis. They don't know how what it feels like to think they're a disappointment to themselves and their family. Don't let their opinions rule your life because they're just that: opinions, not facts. Only one person can decide who you are and that's you. Be ok with who you are. Don't let what anyone says dictate how you live your life. Realize that you're perfect just the way you are. Even if you're not just like your siblings. Even if you're not exactly like your parents wanted.
Don't let any of that bother you because all that matters is if you like who you are and as long as you do you should be happy. Happy with the person you are and the things you've accomplished. Also for the things you may one day do in the future. Set your own standards and expectations made by you for you. Expectations made for the person you are and will one day become.