I think a lot the reason people don't like the game is because it kinda depicts what people already do in free roaming games. Sure, it's gory, and there is no other goal then to kill, but it looks like an ok game. One scene shows walls collapsing and a few destructible things, so if this was cheap, I would probably play it, as the cop fights look rather interesting. But anyways back to the point bluh i'm bad at this opinion thing. This game just shows what people do a lot in sandbox games with guns, but it's actually telling you to do it. In GTA, you kill tons of civs, and I HIGHLY doubt anyone went any one of those games without killing one person. This one is just telling you to do it, and people go all "ehh but its so violent!!111!," it just seems like they don't want to admit that they do these things already.
Dunno, just my opinion.
Besides, the dev seems to be treating it like a joke game.