Yeah - as a parent, you’ll just make it worse if you got involved.
That said, I’m wondering, is there more to the story that you don’t know about. Both my kids went greek.
One is in a sorority and one was in an academic fraternity that he voluntary left because it was just a drink fest.
I could be wrong - but I don’t think if you are a pledge and doing everything that they just drop you.
So I wonder if there’s more here.
All that said - and forgetting it’s disappointing, if he did nothing wrong and they’re just jerks, why would he want to hang out with them anyway?