I think people are confusing their morals with their enjoyment of the story and thats why they dislike it. I for one dont care and am along for the ride.
So anyways I thought there would be a new character a Male character inflicted with the same curse and his own relationship troubles too and we would get some characterization with that but Im guessing this new demon just wants to play along? I wonder if author would expound more on these demons and their culture and shit.