Me neither. Imo he's kinda slow, mentally. That would explain a little his attitude. Remember he claims he didn't know ab the killings and haven't performed them himself.
But, he did know about the ghost bride and the starving ghost, that ps is not innocent...
He could know "there's a bride who killed herself/died in the fire, get me her remains" and "there's a corpse of a peasant, bring it me".
It looked that he realised Chaehui actively drove them to death and orchestared all of it, only when Nok asked him.
Sorry, but I don't feel sorry for the burned face. He did too many terrible things to innocent people, including kids ┑(￣Д ￣)┍