That's because most of the film is nothing but a series of references and homage to previous releases ranging from "The Texas Chainsaw Massacre" to "Night of the Living Dead" and a whole host of others.
Entire bits of the film are lifted from Evil Dead 2 and Night of the Living Dead and numerous other films.
For the audience, we are treated to a 90-minute homage to the true classics of the horror genre: "Evil Dead," "The Texas Chainsaw Massacre," "Night of the Living Dead" and others.
Roth's knowing homage to the gory glory days of 1970s American horror cinema draws inspiration from "Night of the Living Dead," the collected works of David Cronenberg, and every stupid kids-trapped-in-the-woods slasher movie.
The movie is actually not as nasty as he claims, though there are some nasty images of lesions and the like, and plot-wise it has more in common with The Stand than Night of the Living Dead.
While it's reasonable to assume that Roth is an unalloyed fan of the kind of horror film that began with George A. Romero's Night of the Living Dead in 1968 and then took us on the various paths of Tobe Hooper, Wes Craven and Sam Raimi, it's also inescapable that Roth lacks the one thing that set those directors apart from the run-of-the-mill horror boys he brings nothing really new to the table.