Everyone hates on HR here, but I did found them quite good in companies I worked for. They were not the ones who judged technical skills or even picked people. They scheduled interviews and such.

The worst hiring nonsense I have seen came from engineers. Stuff like giving people weird puzzles, rejecting or accepting people on random factoids, "beer test", demanding uber senior experience for an unglamorous boring take jira close jira position. And above all, believing that every good engineer is my copy. It takes an engineer to reject a guy because he reads different blog, has different opinion on programming languages company does not uses anyway.

I heard a hiring manager, an engineer, say that he knows whether he wants the guy or not in first 10 second. It is clear in that first sentence from vibes. I genuinely it is people like him who make hiring process into crap.