This is definitely low hanging fruit, but....

Feyre sucks. Rhys sucks more.

I've read the entire series, and I nearly yeeted ACOFAS out a window (metaphorically speaking since I was listening to the audiobook).

I think the thing that makes me mad about them, is that I actually think they could be interesting if the narrative had any interest in holding them accountable for their actions. Except it doesn't, it uses the "morally grey" label to make them look sexy, but shies away from any real accountability because they are perfect baby angels that do no wrong.