I'm not sure why people beat themselves up so much for not passing a candidate filter where teams of people select a candidate from a list based on various criteria and instinct. It has been mathematically demonstrated that these processes fail at doing a better job than throwing a dart at a wall containing a list of all the candidates.

When I get a rejection letter for anything, I shrug and treat it like losing a raffle. I don't sweat it, the ticket candidate selection process is not based on merit, it's based on randomness.