the fraternity my big bro is in is mid tier...?

Hey guys so last night I was trying to score some dg girls (not in yet but they said they’re for sure going to be in dg) on donlon 4 as per usual when I told them my big bro was a brother of the sigma chi.

They started laughing and said they have to go to the bathroom but didn’t come back.

Then I checked this webpage and discovered that they actually have like a 2 star rating for classiness / looks and a 1 for friendliness.

I’m going crazy because the person I’ve looked up to for the past 17 years of my life is actually in a mid tier fraternity??

I’m assuming most of you are in top houses so can I get some advice on whether I should cut him out of my life to save face??
Maybe message him and say I can’t talk to him for a little??