There are movies that have in-depth plots. There are movies that have interesting, complex characters. These films often make us contemplate our existence through obtuse themes that require introspection and careful pondering. And there are movies that are none of these things and yet still maintain a level of entertainment - visceral experiences that emote excitement, or fright, or romance, or comedy... perhaps even all four if we're lucky.
The Demented has none of these traits. It is devoid of any artistic originality. It is predictable and bland. Watching it makes me contemplate how much I value the hours I have left on this earth, and whether or not I should choose to go do something else right at this moment. But The Demented is a cheap zombie flick, and this fact alone forgives many sins.
The ending however, catapults this film past redemption. It makes me angry in ways that other things make me angry, like willful ignorance, 3rd world poverty, and excessive Facebook selfies. In the last few minutes of the film, just before the credits rolled, had there been a baby present, I would have punched he/she in the face. Had there been an invaluable painting handy, I would have smashed it into oblivion and declared art dead forever.
This is what you can look forward to if you decide to watch this film. Perhaps that's what you're after: a reason to be depressed and angry at the world. Perhaps you're manic and need a reason to not love yourself anymore. Then this is the film for you.