I think I like reading first and then anything else. If the film is different or worse, it doesn’t actually detract from the book. I try to look at it as someone having a try at a tribute rather than replacing the book. Hitchhikers Guide was different, and many complained, but “hey it’s different” is a silly complaint when Hitchhikers Guide was different in literally every medium but film and book are always going to be the most seen. Foundation is different but nonetheless enjoyable. The emperor Cleon is never like that in the books but instead in the show, personifies the entire empire, ruthless, vain, powerful but performative, human and not. How else to portray a 10,000 year empire in a few dozen episodes of TV? I saw the Lord of the Rings films before the book but Christ I could not read those books without some higher level, more tangible image of what I am reading.