While I agree with u, but I would like to point out that MC is an agent. He has a mission to do, truths to uncover, so he has to keep pushing forward despite the traumatic experience. He doesn't have the time to sit and process the depth of what happened. He needs to get it moving with what he came to do. I think the author "brushed it off" bc that's just the circumstance of the story and the MC's character. He's very goal-oriented and well-trained. Surely, he had seen and been through worse.
God forbids so, I've never gone through anything alike but my assumption is that he's dealing with that traumatic experience in his own way, channelizing it in form of hatred instead of being depressed which isn't like him, being an agent needs them to be strong-minded to be able to face dangerous situations, like assassination for example, so it's probably why he won't just budge and fall
The story was going so well UNTIL THE S.A. I didn't think there would be any cause it's so popular and I've heard a lot of good things about this manhwa which is why I'm soo confused.
And I really dislike how as usual it's brushed off as if going through that is not absolutely traumatizing. The characters would be so much more 3d if other emotions were expressed or even just letting the mc process what actually happened instead of just jumping into the next plot line. (︶︿︶)＝凸
This is just my opinion based on what's happened so far though