Review Detail of SealDeity in World's First Demon Lord

After finishing the book, I have to say that there were excellent points to the story and some not-as-great ones. Now my favorite moments in the story were that for most of the plots, the MCs had clear plot armor, like gaining new powers right when they needed it the most. Normally people frown upon plot armor, because it takes away tension if you know the MC won't actually lose. I love how the author constructed the plot armor to have an in-universe source, i.e. Ms. Kang and the Demon Lord, but it does have one problem. After the Demon Lord stops being able to manipulate the MCs' storylines, I feel that the MCs should have had a moment where they realize the extent of their previous plot armor, and perhaps had character growth as they realize they don't need it anymore. One point that I disliked was that Sakura's initial plot was supposed to be a thriller, but I think that the LGBT+ antagonism took away from the thriller plot. Now as someone who is actually bi, I don't have a problem with LGBT+. I just think that from a narrative standpoint, the reason Jason was a big antagonist was that he was transphobic, and I think Jason could have been developed more as a villain by having him kill off an acquaintance, rather than him just spouting transphobia every time he has a dialogue with Sakura. The biggest problem I had, though, was that the MCs were able to actually defeat the Demon Lord. Now I realize that they could because he let his guard down, but as soon as he was poisoned he could have just teleported away, and neutralized the poison, before returning to fight. Plus, as someone who was literally able to vaporize the entire Korean subcontinent, a fact the author seemed to gloss over, I don't think it would make in-universe sense for the MCs to think they could beat him. In-universe, that would be like someone shooting a shotgun at a nuke and expecting it to fall over, completely disarmed. I just think that perhaps the MCs themselves didn't have to defeat the Demon Lord. They could have forced a reincarnation spell on him, so he wasn't really defeated, but evicted. Or on the other hand, the Demon Lord could have either won, or let himself be killed and be like "this world bores me, but I didn't have the heart to commit suicide. so long, off to the next world" and that would have been a perfectly fine ending. Not that the original ending wasn't entertaining, it just didn't make sense worldbuilding wise. TLDR; just read it, it's a good book if you can suspend your disbelief for the ending.