You’re not wrong. He’s got socializing down to a T as an art form, but doesn’t have anything going on inside, so it creates these problems for him. People clearly assume that he’s deeper than he is, and are disappointed to find out.

I saw another commenter note that all the while he was bombarding Koyun with questions, we don’t actually know the first thing about his interests and hobbies. Makes sense to just assume he doesn’t have any?

That said, I don’t think he’s irredeemable because of the interaction with Miki. It’s not that he was completely in the wrong with Koyun, either, he couldn’t possibly know how deep her anxieties go. Only the viewers have had access to her insecurities so far, so the blow-up was at the very least unexpected if not unwarranted. Can’t wait for the next episode!