Because he couldn't trust her, they were basically keeping against his will.
Though he loved her, he couldn't get over his pride.
He was a dick. But I guess we should be happy he was just neglectful. Because some of the regretful ML's are Satan incarnate.
Also in their past the korean government tried to use his wife to make him go along their commands thats why he pretended not to get close to his wife at that time to keep her safe
If he wont follow them ig they're going to threaten him using his wife
what was the reason again he treated his wife like trash cause why does she take him back ┑(￣Д ￣)┍