I think he’s frustrated with his new emotions that he’s never experienced before in his 1000+ year life. And he partially blames Mark for sparking them into existence. He can’t accept he’s become like this, he feels like it makes him weaker, which the ultimate value of all Viltrumites. If he survives I bet he’ll come to realize emotions aren’t really a weakness.
I think he’s frustrated with his new emotions that he’s never experienced before in his 1000+ year life. And he partially blames Mark for sparking them into existence. He can’t accept he’s become like this, he feels like it makes him weaker, which the ultimate value of all Viltrumites. If he survives I bet he’ll come to realize emotions aren’t really a weakness.