Do they?

I’ve never met one. I’ve seen plenty of rage inducing posts online though. I’m sure somewhere, someone like this exists, but it’s probably rare enough most of us would never encounter someone so socially maladjusted in our entire lifetime

Which isn’t to say entitled people don’t exist - they do - more so that this level of oblivious entitlement is unlikely to continue existing into adulthood. Eventually it comes in conflict with reality and they learn acting like that only ends in mockery