The Dark Tower. Was so embarrassed that I brought my wife thinking someone could possibly take 8 books and boil them down to 95 minutes that I made us leave a half hour in. It trivialized everything about the books in the worst way possible.
Also, Nacho Libre. Just couldn't do it. I don't ding JB for it at all but really bad.
There are bad adaptations, and then there's the Dark Tower, which was akin to a full palm-open slap to the fans while desperately hoping they could maybe appeal to some movie goers that were unfamiliar with the books, which it failed to do spectacularly.
Hey now, The Mist, The Shining, Salem’s Lot, Storm of the Century, 1408, Rose Red (Depending on your tastes of course, it’s bad, but very watchable) that would like a word. Hell, Silver Bullet and Maximum Overdrive Are also not bad if you enjoy less than great movies.
His cocaine era was his best era. That being said, I did enjoy many of the Dark Tower books, but only as standalone books and not for what they contributed to the series overall, which was a large mess of half thought-out needlessly over-explained medley of what I can only summarize as pure narcissism.
Nacho Libre is easily one of my favorite movies of all time, and I specifically avoided watching it because Jack Black was doing just terrible shit at the time. Now, my closest and oldest friends and I quote it at each other all these years later. I am truly sorry you didn't like it!