I'm pretty sure the only reason this has negative reviews is due to the hard right Truther nutjob in the first town. They miss the point that no one likes Colton, not even the player character.
Its been a very decent game thus far, with the only major flaw being that the sound occasionally drops for some reason requiring a hard restart. I expect this to be patched out pretty quickly.
Zombies are decent, Combat has been competent, and the crafting is in line with 'The last of us' style.
Nothing will prep you for coming around a corner and seeing a zombie horde 400+ strong, and your inability to make a dent on them.