wow.. so much text...
Call me strange, but I kind of enjoy this, too.
By enjoy I means I got irritated to Keita too, just like how Youko get irritated to him. It doesn't means I like it when I get irritated by something, but it means I feel I can understand how the main character feels. Means I understand whats going on here, on the story. And that makes me enjoy the story.
After I think about it, I think I'm understand now why I can't enjoy Akuma no Riddle. I think that's because I don't understand what's going on there.