Man, people really expecting Kate to be the villain? It's possible I suppose, but the subtext at the very most has her doing these bad things for some undisclosed good reason. If she was basically manipulating these girls in order to have her own hit squad she would be acting very differently. We don't see that. We see her almost desperate to get into the sorority, willing to suck off randos and all sorts of stuff to achieve this goal we have no idea what it is. It seems very likely that her dad is going to be the big bad, and she will have been working against him to "save the world" or what have you. Notice the two dudes we saw work for her dad, not for her. And everything we have seen them do so far in college hits has been in retaliation.
And that is the main problem with why there is next to no catharsis in the revenge scenarios thus far. because the collateral damage is always worse than the real damage. The first "win" is something you cannot avoid, and it's against the woobie of the BS. That win destroyed the lives of the entire sorority except the BS. Now that I think about it, anyone at that college and the sorority should be suspicious of Kate and crew. If Kate was supposed to be the villain, she should have leaked images from the entire BS initiation at the same time. Thus she can more easily claim to be a victim. Then have her keep Annie in line, or anyone else who in the BS might not have wanted THEIR images leaked. The MC's crew should be building allies from the Sorority, but Rachel got kicked out of college, Show inner turmoil inside the crew.
But we don't see that, and you can't argue that the MC isn't in a position to see it, because we often see what is happening on their side, and there is zero infighting, zero real manipulation, nothing is seen other than genuine friendship and loyalty. Which just doesn't work well for a villainous group. Hell, it doesn't even work that well for a Hosue of the Dragon style everyone is doing fucked up shit story either. The MC and his gang are the instigators the entire game, and there are more arguments in the camp of the good guys than anywhere else.