Amazingly, he wasn't trying to insult her. It's just how Katsuki talks. Aggressive. Rough. He's also comparing her in his head to someone else. Someone he insults a lot but... cares about.

That selfless-for-one-another line has him looking furrow-browed and contemplative though. He wants to get away from that conversation. Now.

After a moment he makes a frustrated sound.

"Just going in circles. You say you don't have a lot of help? Fine. Sign me up. That pinpoint thing can be used to travel to other places if you got coordinates, right?"