Saw a comment on AVClub that I 100% agreed with, which is what’s frustrating about this is that it should have been a risk-free project. The first Dark Tower book is lean and mean as fuck, basically a cowboy story with a few trippy bits attached. Someone like Cuaron or even Rodriguez could have cranked it out as a stand-alone at relatively low cost and time. If it doesn’t work nothing much is lost, if it does you’ve got a film that works on its own merits and is a perfect gateway to the more ambitious later books.
Instead they tootled around for seven odd years and wasted a massive budget on… whatever they thought they were doing. Fans aren’t impressed with it, non-fans don’t know what to make of it. A failure on every level really.