I agree. The story only focuses on MC saving the world and doesn't explore Mc's feelings in more detail. Maybe there's no time to suffer from PTSD, or maybe being in the dungeon for 3000 years is enough for him to accepted his faith (ofc no way the author would go every detail on what had he experience in the dungeon) In my opinion, Mc is fed up and has lost hope. but when his mother was still alive, that was the turning point, he chose to destroy all the existing dungeons to create a new, safe world for his family. The world situation at that time was very chaotic, it could even be said to be the end of the world, who would think about metal health
I think imma drop this the timeline got too confusing and memory erasing was practically useless it's just fighting after fighting after fighting each season