I think Apollo and Moros are just a bit bleh. Like Moros is cute but he's kinda just boring compared to may other characters in the game and only really has fun interactions with Dora and Melinoe. I had the same issue with both of the romanceable characters in Hades 1. At least in this game we have Eris.
I think Circe is the only character who is entirely uninteresting to me.
Perhaps the golden rock was inside us all along.