It's ok to feel like that. Don't worry. Life is like a polynomial equation--there are way too many turning points than you might think. So, you just have to wait for the right turn, and everything starts looking good, of course until you reach another turning point. Life's like that. You don't have to be Miss world or Mr. X to be a non-burden; you don't have to be able to prove why Einstein was in fact wrong to be a non-burden; you don't have to be a political leader to be a non-burden. Stand up for what you are. Be yourself. You can never surpass anyone by immitating those very same people, rather you can do it by doing it differently. Keep yourself busy. You tend to think less of those things when you are occupied.