Zhong Yao died in a plane accident, but after his rebirth, he discovered that he was just a character written by someone else, and the book was called "The Domineering President Falls in Love with Me".
So going dark seems to be a natural thing.
When the world completely collapsed and only Su Susu was left, Zhong Yao, as the only normal person who knew his identity, shouldered the heavy responsibility of slapping Mary Sue in the face and snatching the first male and second male from the heroine.