[ Oh no is right. Because Klaus hit the nail on the head, and there's nothing Catra dislikes more than that-- people seeing through her. People understanding her. She hates it more than anything.

You can even see the moment it hits her-- it's when he says "cast aside." Her eyes go very wide... and then very narrow, as her nose crinkles upwards in a snarl. ]

You don't know anything about me! Maybe you're content with a life of mediocrity. Whatever helps you sleep at night. But me?

I'm going to get what I want.

[ Then as if to demonstrate, she turns and walks up to another vendor, handing another food sample out to someone else who'd been waiting in line, and snatching it out of their hands, stuffing it in her mouth before they can even grab it back from her. ]