I by no means would suggest “MST3K” the movie to anyone interested in getting in to the show. If you’ve never seen the cult series before, the movie surely will not win you over. When you take away the rabid fandom (I will watch the entire nine seasons in one sitting someday!), the movie itself is somewhat mediocre and disappointing. We deserved a fun, and epic movie, with some of the better jokes we’ve seen on the show. We even should have been allowed the privilege of a better movie. How fun would it have been to see the guys riff on “Plan Nine from Outer Space,” finally?
Only many, many years later did Hanna Barbera begin presenting the Mystery Machine gang with actual supernatural threats once their audience matured. But even when facing actual zombies, and demons they were never really in actual danger. Director 
It’s almost as if Marlon Wayans, the least funny Wayans brother (which isn’t saying much) decided he wanted to get out of the shadow of his big brothers and siblings, and just made his own comedy movie. Since the “Scary Movie” brand is now someone else’s property (since that series is so genius), we now have “A Haunted House” a movie so bereft or wit or actual comedy, that it’s embarrassing. But Wayans himself seems intent on going his own way and forming his own comedy niche. And he fails. Wayans only really works well under the guidance of someone who knows what they’re doing. Or (in the case of the “Scary Movies”) have some idea of what they want to accomplish in the arena of comedy.