@mushroom_soup
Personally I haven't seen either of those, so it's hard to comment, but I'm guessing that in the case of The Shining it was because of snobs that have read the book and were dissatisfied that it wasn't a faithful reproduction.
I'm seeing some of this today with MCU movies. For example, people that were really invested in Spider Man as he is portrayed in the comics weren't massive fans of the MCU Spider Man movies, while people that weren't familiar with the comics seemed to enjoy them much more.