I don't think it's a unique problem. An action movie that fails to instill a sense of action is just as bad as a horror movie that fails to instill a sense of h

I don't think it's a unique problem. An action movie that fails to instill a sense of action is just as bad as a horror movie that fails to instill a sense of horror. For example, I tried going through some of the later Steven Seagal flicks lately. The way they're cut and the pacing make them absolutely boring. The stories they tell aren't cohesive, and the action is the closest thing to stills of Seagal's limbs you'll get before you'd have to call them slideshows. Those are bad action movies, and I suspect that what you call bad action movies are actually just campy/shoestring/"so-bad-they're-funny" yet entertaining action movies. Same for fantasy. If your fantasy film is utterly mundane, unoriginal and uninspiring it'll fail to deliver the fantastic. Not to mention comedy. If your comedy is not funny what's left is often a really thin plot revolving around unrelatable characters under unbelievable circumstances. Drama film has no drama if you don't care about any of the characters. I'd still call these horror, action, fantasy, comedy and drama films, respectively. As much as I think it's bad, the intent is obvious, and a bad genre film is just one that was really bad at achieving it.