When Ziek was in a bad mood, other people's successes would be unbearable to witness. Because it would set up a comparison that would make him feel even worse. He felt just like Silvia LeClére when seeing her brother's accomplishments, with a difference, that he could control it.
Speaking about Silvia, Ziek couldn't stomach the sight of her. He would avoid her at every opportunity he had because the pretty face she got from Lu Kai would be gone the moment they crossed paths.
When Ziek took off the bandages around Bing Shi's head, he saw that hot ass chick who thought she was better than everybody else, "..." He quietly put more focus on Ezikiel to avoid stressing out his wife with his rants.
And let me know in the comments what arcs you want to see. :)