No. You're not the only one
There's some wonderful imagery in it. (Though that said, I find Metropolis has lovely imagery but is rather long and not that exciting.) Given the size of the novel, and the depth of the content (discourses into lifecycle of the sandworms, scheming to produce the Kiswach Haderach etc) it was never going to transfer into a condensed film format but the film gives a sense of the depth of the milleau and gives you the opportunity to remember the general flavour of the book without having to dedicate the hours needed to read it through again.