Though I've read neither book, I fully trust your negative opinions on their translations to film! I know you are an avid reader with a critical eye. And I haven't liked most film adaptations of novels I have loved in the past. (I did love the movie The Shining — though it did not come close to reflecting the complexities and expanse of the book, I felt it shone on its own merits.)
PS And I must admit, I very much enjoyed and respect both the Fight Club and I Am Legend movies. Sometimes it pays not to have read the novels
)