tl:dr 6/10, forgettable protag, deranged plot, bad women's anatomy, but somehow still pretty fun, and if you like gruesome deaths, this has plenty of that.

Spoiler free review

So the art is very hit or miss in this. The way the artist draws women makes me think he hasn't seen a real woman in a long time. So be aware of that. The first half of this manga is pretty basic fare of run away from the thing that's gruesomely killing everyone, but once the plot gets going it gets... confusing and not always coherent, but enough to keep me entertained. Both the protagonist and antagonists feel pretty flat.

What works in this is they never forget that people are here to see people get ripped apart. Also it does seem like the author did remember all of his plot threads that he drops in this, and makes sure to pick them up and tie them up, even if the reasoning for how he does it is... questionable. And last major thing is I never really felt that this did the classic "sdo a flashback so they care right before I kill this underdeveloped character". Really at the end of all of this, the fights are fun to watch, and I enjoyed watching the character grow and overcome their challenges, or fail to do so.