"I do belong in hell, but I will stay until the last moment to see this world crumble before returning to the place where I belong."
"There is no need for you to drag the whole world with you." In other words, if you want to go to hell, you could go alone.
"This is a ritual sacrifice," the man said with sudden vehemence as his gaze turned icier. "Ruining everything is part of the ritual; this is the fate of this world! No one can change it."
"Ritual sacrifice?" Xia Wa sharpened her gaze. "For whom?"
"For myself—" The man answered.
Xia Wa was startled. She looked at him and nodded. "I understand now. You hate this world because you have been treated unfairly by it."
