You know you had a perfect opportunity to completely avoid her, right? You didn't have to do her S.Link (even though you'll miss some extra content.), you don't have to download her(for Free) in P4AU and plus you could just not watch the anime since you hate her so much.
I'm a Final Fantasy fan but if I don't like Lightning, I can just skip the whole thing.
Gooch, if you haven't already done so, you might want to read Corvo's entire post. I'm relatively neutral to Marie, but I did think Corvo broached some salient points, even if all of that did get a bit long in the tooth.
Sorry for assuming you haven't, but I'm just not sure, since you asked for a TL;DR.