Easily the worst anime I've sat through. This series is just flat out soulless in both its story and production.
Storywise there isn't anything at all. The fuckass MC wants to commit genocide for a reason that is fucking petty as hell given he didn't give a shit about the main problem that led to that reason in the first place. The main girl is an insufferable pacifist that honestly comes off as a genocide apologist, especially given a scenario that happens during ep 5-7. Not one other character is likable or memorable, mostly due to being killed off minutes after their introduction. And don't get me started on the world building that boils down to repetitive misogyny.
As for the anime's production it's somehow worse. The animation (especially in the later half) is a slideshow that rivals SDS S2+, multiple animation errors that went unchecked, many of the brutal scenes from the manga are heavily censored or are hardly given any impact, the use of cliffhangers were hit or miss, and too much budget was spent on getting A-list VAs on the project (one even had to get replaced mid-production). They didn't even try to make this anime look presentable. And the worst part? It aired in Fall 2023 amidst the best seasonal lineup that year, against other edgy revenge plot anime like Ragna Crimson (watch that instead since at least that isn't a burning landfill) as well.
I'd say to not bother watching this atrocity but no, please watch it in full so you'll have an idea on what qualifies as a 1/10 anime.