I've been thinking on why I stopped liking this story, and finally understood.
It lacks focus and even objective I can tell and is only going by route.
The dungeon exploration being done all in one go makes it be less a dungeon and more a list, no matter how hard they try to describe things as a challenge.
The powers he get also are mostly an interesting name after some time, and most of the ones that are not are either convenient just for the moment or rarely get used after the one time.
All in all, the dungeon exploration and monster eating, while supposed to be the focus of so many chapters, is just a boring list.
Would be much better if we got just the highlights of a dangerous dungeon and the one big challenge at the end, instead of so many levels with so many sub-bosses.
Maybe, maybe this could be salvageable if turned into a videogame... yet I struggle to imagine how some of the systems described in some of these dungeons would make it more than a boring chore.
Much more interest in the small scene of the other characters, yet with how the focus on them seemed to rush it felt like the author consider them just side-content and the parts that annoy me the main dish.