It doesn't help that AMC+ provides possibly the worst user experience of any of the major streaming apps I've used. Constant crashes, failure to resume where I left off, and just straight up "not working" is a total killer when there are a dozen other apps I could be using to watch other (admittedly non-AMC) content.
Feels like they were banking on exclusivity of AMC content and put not enough effort into the technical and UX aspects of their service.