I'm a firm believer that even a trope-y manga can be written (drawn) in a way that makes it unique and entertaining. Unfortunately, this is not one of those works.
This isn't a one-off blunder, since the author's second piece, which I've read and dropped, is also as generic and empty. It's as if the author pressed a button on "random isekai plot generator" and received a regurgitated, incoherent and irrelevant mess, which the artist promptly turned into the work I'm currently ragging on.
I'm beginning to suspect that there's a decent chunk of authors out there, who are ill-equipped to write fiction, be it because they only read manga (and thus can only imitate what they've seen), or because they just don't care about their craft, outside of getting compensated for it.