The negative reviewers missed the nuanced point of this film. I am a huge dystopian post apocalyptic movie and zombie fan...and have seen most of them - even all the foreign ones. This one is refreshingly different, and I enjoyed it immensely, despite its flaws. It's not a film about surviving (such as The Walking Dead), but of just barely existing, and the tricks to the mind it plays.
The entire movie is filmed as if the viewer is in a mental dissociative dream state. Which you would be in a world such as this one. Far too many movies show unrealistic people who are always on their guard, never making mistakes, always able to survive with near super hero powers. Here we see real humans, who make inexplicable mistakes. However, this is a dissociative dream state world, we don't need the details, nor does what we see need to make any sense. There are no deep human relationships in this world...they have been destroyed. The allegory to our materialistic society is deeply amusing - as the afflicted show. There are also many realistic terrifying moments...usually quite fleeting (which makes them even more terrifying).
The musical score and photography are absolutely exquisite. The long creepy pauses, fog, deep forest, strange guttural screams, strange edits all add to a feeling of disassociation. The viewer becomes part of this surreal world. The suspense is found in the absolute quiet minimalism, the tiniest of sounds.
Too many negative reviewers whose movie goer experiences demand factual linear storytelling or action will not like this film. My take is it's an artful film I will watch several times again. Must see the reason for this dystopian world. It's alluded to after all the credits play. If you don't see it, you will never know why this world happened.