Just because Weg often shows empathy doesn't mean he's not brutal. He considers it normal to fight over offenses, and a conversational partner not being up for a brawl actually comes as a surprise!
He gets further disappointed in Þrym, as those casual fights are supposed to be done between equals, and Ellen's reaction tells that this isn't how it happened lately.
Weg's charming side makes his Monstrous intentions more profound. It seems like a common thing among such people.
Oh, he sincerely believes his intentions are for the greater good!