The music is so bad.
It almost feels like there's three different people responsible for scoring this film. One guy put in the really great, droning, Angelo Badalamenti-like music that truly worked and built tension. The second guy put in the blaring horns, piano, bells, and other goofy nonsense that sounds like it's from an 80s slasher. Then the third guy put in the awful girl band butt rock that completely ruins every scene that features it, including what could have been a truly scary climax.
The scene where she goes to the field herself could have been really sad and horrifying, but the tone is completely ruined by the music. Did the filmmakers not have enough faith in what they were making? When it's at its simplest, the movie works so well. Why all the jarring musical changes?