The meritocracy myth is s fundamental tenet of tech and Silicon Valley culture.
Maybe it's because they feel as if their success is undeserved and they project that feeling about themselves onto others?
I have noticed a strong undercurrent among some on HN that has bought into the anti-work movement that seems to have a very high overlap with anti-capitalist/communist/socialist crowd (and also, I suspect, a very poor grasp of history and economics).