@nureha
I disagree with that. He does not hate his family, he just always rejected his position as the clan heir after what happened. It’s clear from the world building of this story (if you look at Chen Ge and Lu Ren Jia) that being clan heir is a lot of responsibility and can be a very dangerous position. Chen Ge has assassins sent after her by the Si Mo Si clan to kill her in the forest trial.
For me, it’s understandable that Zhang Nan wants to run way from that position.
It is stated in Chapter 28 that
he is aware that the murder was not done by his family, even though he believed that as a child. Because, well, kids are kids.
And losing the house was his grandfather’s and father’s decision. They sold the house for Zhang Nan’s sake but without asking him or telling him.
I think his guardians are sort of the real clown here. They sacrificed a lot for his sake, but did so without asking him, and expect him to appreciate what they’ve done. I don’t really like that part, even if they say they’re just doing what they think is best for him.