Hey bloniac, sorry you had a negative experience. We only "reject" candidates if they're using the platform for something other than finding a co-founder (eg. selling their consulting services), or if the profile is incomplete to the point that someone reading it couldn't evaluate the fit. If you email me with your YC username, I'd be happy to take a look and give advice on how to improve your profile. We definitely allow and encourage users to ping us post-rejection if they've improved their profile so we can give it a second look.