In my opinion, the opposite is more true.
in the end it's MC's story, and he changes a lot because of the matches he makes.
the most immediate example of this is that without Sage he would never have become the 'future' of the DIKs.
at this moment of the story MC is much more changed from when we were introduced to him than the LIs, who, apart from Maya, all seem to me to be quite anchored to their original characterisation, swinging from that position but eventually returning to their original position
I get it, but I think that all of them changed their lives due to different reasons. MC life changed too, of course.
From a lone loser at school, he comes to college, where several gorgeous girls literally fall on his head, he joins one of the best fraternities on campus and at the moment is an unspoken leader along with Rusty and Tommy. He also changed the DIKs, teaching them what he can do himself, showing them (albeit after Sage's advice) how a healthy brotherhood should live - in an adult way, and not with some father's money. DIKs and college changed him by making him more liberated, he fell in love with hangouts and parties, found a bunch of friends that he didn't have before except Zoey.
I mean that I don't suppose that MC is a unique person and a "king" that came to change everybody and everything. He also changing. To good or to bad side - depends on his choises.