It is dark, but in a stupid way.
I just finished another movie, "Bewitched": http://www.rottentomatoes.com/m/bewitched/ This one scored even worse than "Burying the Ex", but I liked it more.
This is a story about a witch (Nicole Kidman) who wants to live a normal life and so she lands in Hollywood and becomes an actress in a TV series called "Bewitched" which is a remake of an old TV series. She knows she can snap her fingers and get whatever she wants, but she wants a particular guy (Will Ferrell), the male actor in the TV series, to want her of his own free will. Since he is rather self-centered she doesn't know how to do this and so she gives up trying and then the magic starts.
I'd rate this 10/10.