The story has a good start with a lots of world building being made and giving multiple possibility to where the story could go, but end up barely uses any of it. Not only that but it also decide to go around some of these rules to make to mc even more op which just makes it uninteresting. It's unfortunate because it had potential but on top of this information, despite the multiple possibility the manga set up, it just ended up with a rushed ending and barely any story. I personally enjoyed it, but i can understand why most people would find it bland which iswhy i give it a mixed feeling