It has its okay points... but the whole plot is full of holes, inconsistencies and straight up nonsense.
Most of it is intolerably grimdark up to a point... with characters dying like disposable tissue just being thrown away, stupid decisions being made that result in more insanity... one inexplicable bloodline of yandere lunatics for... no real reason...
Then it briefly breaks the cycle of grimdark...
.... before sinking into a long, arduous and pointless slog culminating in various pointless actions and then a massive time-skip.
There is no real incentive to get attached to anything in this manga. Not even the characters that return. All lives are confetti, and it is like the characters are trying to tell us that lives are important, but the manga itself completely contradicts this notion.
... So even by the end of what has been released so far, I just feel like I've wasted my time.
Rated 4/10.