I liked Ghost Adventures when it first started out, as it felt different from the majority of US ghost shows, partly in that it took the time - half the show - to discuss the history and stories of the location, to give us context, and partly that they weren't throwing DEMON around willy-nilly and seemed to possess at least a modicum of self-awareness. Now? Now they appear to have entirely swallowed their own hype, and are only worth watching for absurd moments like Bagans hopping on a rail in a gentleman's club to recreate the leg-waving movements of a stick figure they'd just captured. They fully warrant the 'for entertainment purposes only' disclaimer that appears before eps shown on Really.
I vaguely recall another show that seemed decent to start with, but then in the last few eps the Main Guy - there's usually a Main Guy in these shows, I've noticed - was latched onto by a DEMON and the season finale I couldn't even be bothered to watch focused on his fight to rid himself of it. He might as well have been called Winchester it felt so contrived and fake.
There was one last I recall, likely on Syfy when it still had I's instead of Y's, that revolved around a team of four, each member of which would bring a mysterious case to an initial meeting. The cases would be whittled down to the most promising two, then the team would split into pairs and head off to investigate. It was actually pretty decent, but strongly undermined by a cameraperson who seemed to be on a permanent caffeine rush, if the endless wavering shots, crash-zooms and whip pans were any guide. Note to producers: forced, overdone shakycam does not lend your programme immediacy; it just gives your viewers headaches.