I would wager with 99.9% certainty that their classmates used their time at school to network and that is why they are in better places, doing amazing things. This loser didn't.
I saw a huge post on reddit years ago where people were whining and crying about how unfair life is because it all boils down to the old adage, "it's not what you know, but who you know."
For a lot of them, it seems like that post was the first time in their life they had ever heard it. There was endless butthurt in the thread because people were asking why these losers' parents never taught them this. There were no answers given, just lashing out about the "unfair system".