Yes, but he never said what he did was hurtful. He never acknowledged it and does not seem to know that it was so. That is the issue. Of course everyone isn't perfect and that reaction could just be a blip or a mistake. But he did not resolve the issue. He just never acknowledged that it was not the best reaction to have. He even made it sound like that should be a normal reaction to behavior like that and she shouldn't get all passive aggressive at him and tell him what her issue was. For example when she behaves, well, sort of hurtful, she resolves it, she goes out of her way to acknowledge it. I just think she deserved some kind apology of some kind and reassurance that his reaction wasn't the best.
He did say that he wanted to know why she was upset so that he could avoid doing it again
yes, this.
yes taesoo did seem a bit more harsh than he should be but what are you expecting? for him to be perfect and to understand everything right off the bat? like sooha, he's not perfect so cut him some slack for reacting the way he did. imo they're doing pretty good in terms of communication. better than what i've seen in most stories and definitely fit for this story.