I liked way more Akou than Taiki. He lost point for outing them but my god, not a single good character except the poor Yuki. He really didn't deserve to be punished with ending up with such an asshole like Taiki.
I do think Yuki needed to at least get angry or upset or sad or something when finding out what Taiki did. Taiki never even properly reflected on his actions.
The cousin thing also? Because it was DRILLED that they were cousins. It was so sketchy.
In the end it seemed like it was just the mangaka wanting to do an incest story without care for character development or any other thing for that matter.
Kawaii Kara Kimi Ga Warui