I bet you 90% of the YC rejects feel this way. I mean, really, what makes you think you're different from anyone else?
The point isn't that you're the same. The point is that you have you consider that everyone is putting their best foot forward and has the confidence in themselves and their idea to try out for this program.
Maybe they didn't get it... but then I'd say that's more your fault than theirs. You have to be able to convey your idea as easily and simply as possible.