They're just saying that a lot of big groups can be a bit cliquey. That's true for almost any large group, I think the Gowncil is just used as an example because there are a lot of you and you're everywhere.
I like the people in there and I'm friendly with most of them. But I also accept that when there are a lot of them in a game, I'm not a priority for anyone. If I'm in a Golden Star with Jdaddy and no other Gowncil, he will likely save me every veto he wins, because we're friends. But if the choices are between me and another Gowncil person, he's not saving me, even if i saved him a round previously in the same game. This is a literal example that's happened.
So no one is mad at you all being friends, and most of you are well liked (except Toque). People just know you always pick each other so it's frustrating.
I have friends I am absolute ride or die for, but my friends aren't a cohesive group, and I think that's the case for a lot of people. So while it's not any different than anyone else favoring their close friends, it's just more visible because the clique has a name and matching outfits.