This a very edgy, very average story.
It isn't very well focused, straying away from the main co flict so the hero can go and kill some people we barely know until the story handfisted their role in the hero's ultimate demise.
The story feels very on and off because of it, and that isn't even getting into the fact that the hero himself isn't exactly great at exacting punishment to those who deserve it or not.
He just fights and forces the man who killed and ate his mom to eat until he dies, and then proceeds to go and torture a doctor for over 17 hours, despite her horrific actions she got off rather easy.
And then there's the minor issue that the story is pretty edgy and the paging in specific, intense moments is rather... bad (though that could just be my lack of imagination or mangadex's fault) and the story is rather below average.
I've always enjoyed dark revenge stories, especially when it's about the betrayal of someone kind hearted turned evil, but this story isn't exactly a good telling of that concept
I rate it a 6/10, but if I was being a critical reviewer it would probably be a 5 or even 4/10.
The best way to describe this story is an edgy, very confused telling of an interesting, incredibly dark revenge story