I've just finished reading this manhwa and was about to comment the same thing. After the chapter where he lets his "sister" go, I just skimmed through everything. The author made MC become dumb and naïve all of a sudden. Plot armor after plot armor with barely anything related to Dungeon Architect, which should be the main plot of the story. We were baited, weren't we?
Totally! I was waiting for a cold, decisive and intelligent mc! More like apocalypse Mynoghra, I mean all of his past made him the perfect candidate for being a demon! But no. Like at the start he participated in his father death and totally abandoned him, although the father didn’t really tried to kill him and just wanted him to have a backbone. And he was like so happy to see him die while the father was hoping one of them come to help. But the sister and brother, because if one is alive so is the other, he lets them live??! I mean you’re a demon, they tried to kill you multiple times, they’re not truly your family and you let them live??!
And the plot armor…it’s omnipresent and not even fun. Give me back my calculative, cold, intelligent, demon, mc
Art is beautiful, story is kinda meh, and mc is like weak…I mean who would let his sister go like that knowing she literally participated in his decapitation and multiple killing tentatives xD I don’t understand. Just saying “Bad sister don’t ever appear in front of me” won’t change a thing. You’re just piling future headaches for you and putting your comrades in harm’s way…