Wow, most of these reviewers have either obviously never seen a Jim Jarmusch film or seem to understand this wasn't meant to be some laugh out loud big budget comedy or the same old zombie movie.
This is how a zombie apocalypse would actually occur. There would be no heroes, every normal human who is weird or quirky, angry, or downright boring would be affected, and there would be no happy ending. It would end the way the film does, exactly the way you would expect it to: immediate, bloody, and uneventful. It's just like every day life would be, except with zombies killing you. Boring, routine, ordinary, ends with you going to bed.
This film is a brilliant commentary on not just public consumption, but society in general and the state of entitlement of instant gratification. If you come in looking for THAT, you'll be sorely disappointed. Just enjoy the show.