It's bad, and I'm not saying that because "it's too gory" or "the MC is a scumbag", because that what makes me tried the series in the first place, I love gore and if the mc is an asshole that's even better.
But here it's really tame and more importantly really cliché, if you remove the kinda gory part at the beginning it's your average isekai vengeance title: where the mc found out after a near-death experience (or death) that he is in fact really powerful and go on a journey to create his harem of girl from perfectly good but oppressed peoples or species, and
maybe taking revenge one day.
Did I say isekai... and it's not one? Yeah I know that, but that story is so badly written when it comes to characters that the MC feel like an isekai MC without being one, he has no connection to his world, his moral standpoint and culture are totally different from his world and are basically those of your average real-life modern man but slightly more violent. It wouldn't be a problem if it was an isekai MC but here it makes no sense for the MC to be that different from other of his world since no reasons are given.
Overall it's a poor man Nidome no Yuusha, the 2 have a really similar premise and a lot of similarities, it's just that kaifuku removes all the points that make Nidome original and interesting.
So we're just left with a cliché story about an op MC in an otherworld, with blend characters, nearly no story, and the acme of stupidity for a story which tries to pass as edgy and gore: it's ultra manicheic with the MC being overall a good guy with a rough exterior. Oh and the power are also annoyingly never really used at full power because otherwise there's no story.
Well if it wasn't clear enough, don't waste your time. If you want a good revenge story try "Nidome no Yuusha" which is really similar but good or "The girl who ate a death god" if you want a great revenge story with a ruthless protagonist and some gore. And if you just want blood and destruction then look at Last and first idol (beware of: cannibalism, genetic manipulation, genocide, and just a lot of body horror in general, also yuri).