Unpopular opinion, but Dune 1984 was better.

While the new adaptation was entertaining and a very well executed production, details that made the story cool and intriguing seemed to have been sanitized out. I don't know why the writers did this. My guess is it was an attempt to simplify the story and universe to make it more approachable to a mainstream audience. Of course David Lynch would never have stooped to that level, and perhaps that's why his adaptation is disliked.

I often hear criticism of Lynch's Dune that he added things that weren't in the book. But this new adaptation removed so many important things that were in the book to the point of completely changing character motivations. Lynch really did not add that much, and things that were added could be argued as unimportant or merely a way to adapt a concept for screen.