Of course there are always people who are trying to one-up or push ahead up the career-advancement ladder... but I've never ever seen a better candidate appear and challenge someone's position directly. If someone started a new job and starting calling someone out for not doing their job as well, they'd be fired pretty quickly. That's just outright hostile behavior.
Granted I've always worked outside of the valley, I guess FAANG positions can be more hostile.
I’ve been working for over 30 years and this has literally never happened.