Fukushuu wo Koinegau Saikyou Yuusha wa, Yami no Chikara de Senmetsu Musou suru

All you need to know is that this is a revenge manga focused on violence and occasional gore. I'd call it "revenge porn", but that happens to have a slightly different meaning. Revenge gorn, maybe?

In those kinds of works, the protagonist gets an excuse to exact revenge on his enemies, and goes full villain while doing so, and they often include violence, mutilation, sexual violence, and so on. Haven't been a lot of sexual violence in this one, though. Another work of this type is "Kaifuku Jutsushi no Yarinaoshi" which is as bad as this one if not worse.

Anyway, the "hero" is nuts, the enemies are nuts, everybody is disgusting creature, and at the same time the author wastes ton of time providing explanation why this brutal action by the villain protagonist is totally justified. So you have a rampaging villain ex-hero protagonist destroying things and killing people while being a total lunatic about it.

Breakdown:

Story: 2/10
Cheap excuse to have a protagonist slaughter thing, basically. Betrayed hero going berserk on his enemies. The enemies are portrayed as disgusting enemies just so you won't feel sorry for them.

Art: 6/10.
From what I remember it actually isn't bad, and quite skillfully done, albeit not breathaking.

Character: 2/10.
Poor characterization through and through. Characters exist to die and get killed by the hero, or to be tortured by the hero, and the hero is totally bonker himself. None are realistically portrayed.

ENjoyment: 2/10.
Revenge gore porn isn't my thing, and usually I'd want an actual story to enjoy a manga.

Overall: 3/10.
Not recommended. Unless revenge mangas happen to be your thing. Even in this case I'm unsure about this one.

Before reading this review I would like to clarify I do not condone torture in real life. But when it is in a fiction setting then I would say go all out no one is getting hurt.

Personally, for me, I have not come across a revenge manga that can satisfy me usually it fell flat either in my opinion came to an end too quickly or the punishment just does not seem to be that fulfilling.

This revenge Manga for some reason satisfy me I think it has to do with that all the torture is more sadistic than one could imagine and the fact that all the villain character have been given a background so evil that I think the devil would look at it for references just put the cherry on top. I legitly grinned widely when I am reading it especially on the part where the villain characters just break.

Now that my opinion is out of the way here are the ratings and why.

Story: 5/10
Good Revenge Story but it gets repetitive after a while the basic (they did me wrong I would inflict on them immeasurable pain) but the formula still works for my enjoyment. Also, the fact that he is so OP (Isekai Trope) works so better in the story you will get it when you read it.

Art: 8/10
Art is very well done some I would even say it is captivating.

Character: 6/10
This is where the author shines again the MC is not your typical angry revenge-seeking character. He is so likable the way he treats each situation each revenge so nonchalantly, to the fact that he is sadistic with no shit given. He is the pure embodiment of Chaotic Neutral. The manga has no other side character other than the MC and the Goddess (So Far In Chpt 18). It is choked full of Antagonists which all can be summed up to evil just because and pathetic later on, yet the author did a fantastic job in making us hate them even some of the minor Antoginist.

Enjoyment: 10/10
Do I have to say more it is, in my opinion, a revenge story that will have you grinned if you like sadistic and inhumane torture to the point that you will not care if this is justice or not as long as you get to see what he has planned for the next story.

Closing words:
If you like revenge story that has inhumane torture this is something you should try. If not don't as I don't think some people might stomach it and I do not need another argument about how this book is immoral or the author is bad just because he creates such a sadistic story. I know then turned off and enjoyed but it still kinda pisses me off a little.

Overall: 8/10

It's a fantastic mindless revenge manga. It has no depth or meaningful story or anything, but that's fine. If you're going to like this, it's probably not for those reasons anyway.There's lots of revenge and it's highly satisfying. No neckbeard BS either.

Character: 6.5/10

The hero is a nutcase and both he and the author know it. The villains are ridiculously evil to the point where you feel they actually deserve what's coming to them (which would otherwise be incredibly excessive). It's very satisfying to watch him f*ck them up in messed up ways. Not exactly the height of good writing, but quite fun.

Enjoyment: 9/10

I like revenge mangas so this is very fun to read. Don't read it if you're not into seeing people tortured creatively; if that's the case, there is not much in this series for you.

Art: 9/10

The art is really good. The artist nails the "unhinged" look, which is important, and the art is clean and smooth. The protagonist looks amazing.

Story: 6.5/10

Not much story here except revenge and more revenge. It's like for each arc, the author thought of something edgy, and then thought of a way to make it edgier, and kept on doing that until they had an extremely edgy setup. I'll give points for sheer creativity in edge, but it's got practically nothing else. Still, it avoids being boring or annoying in any way, which is respectable.

This is for the person who loves anti-heroes and seeing a character actually go through with their revenge.

Too often are stories of revenge filled with moral dilemma and often the lesson of the story is to not take revenge.

This is not that, this is for the person who likes their heroes dark, the person who wants to see the villain pay for their sins and THEN SOME. This is for the person who wants a main character who could be the villain or the hero. Not afraid to kill, not afraid to cross a line, and will do it in unforgettable ways.

I wouldn't recommend it for someone who just reads shounen you'd probably wanna break into the darker side of action manga with something else like berserk.

Not that you can't enjoy shounen and enjoy this, This is the 2nd manga i've given a 10/10 score in like 10+ years of reading and 100+ mangas. and the first one was/is one piece which is almost like an ultra-shounen

I'm not a fool, when i read it and scored it there were only 12 or so chapters out, with time this score could easily change as the story develops, and i don't rate it a 10 because i think it is 100% perfect flawless in all ways i rate it a 10 because the amount of enjoyment i got reading just 10 or so chapters left a huge impression.