"They should cut 90% of the book to make a watchable movie
"
Let's face it, Patriots is a fantasy, not unlike Lord of the Rings or Lights Out. Personally, I like the book and have read it probably three times. I like the book not because it is a literary masterpiece but for the different survival idea's within the book.
My copy of Patriots is full of yellow and pink highlighter and many pages are dog eared. As an example; when looking for a ham radio, I reference back to the section on communication. Then start to do my own research.