"Alpha male" basically translates to toxic masculinity, and "beta male" basically translates to anyone who respects other people in any way. It's the callsign of pieces of shit like Andrew Tate, who is a human trafficker and serial sexual abuser currently in prison awaiting trial in... I think it was Croatia?

He doesn't know what it means to be cool, so he's hoping that just declaring that he's cool will be good enough to make him popular.

The problem is that the kids who try this strategy almost universally cannot pick up on social cues, otherwise they would understand that it will always lead to the opposite result. People who seriously say out loud that they're alpha males are pretty much exclusively losers or scumbags.