it doesn't matter whether he misunderstood or not. Abusing someone to the point, of them ending up the hospital ,is not what a good or sane person would do. No matter what u think the other party did, going as far as beating them up everyday and turning their whole life into hell, is only something a bad person would do. The seme is insane and psychotic. Life may have turned him into this human garbage but that doesn't justify or change what he did and that he is still human garbage.
He is a jerk, not because he misunderstood and thinks nian nian is a liar but he’s literally abusive in everything, be it emotionally or physically. And what did the abused do to deserve that? Did he physically hurt the seme too? No, the seme has no excuse to hurt someone just because he thinks that person is a liar. He doesn’t even have solid proof. He is a jerk
maybe the deme isn’t a jerk, he is just misunderstanding everything in his eyes Nian nian is the liar, just how we see that side chick hoe as very annoying because we know he is the liar