I haven't seen The Room yet, but the most compelling discussions of its cultural potency that I've read find something to like in it. The most convincing of those was a podcast interview with Sestero around the time of his book last year, and the conclusion he and the interviewer came to was that The Room was like a film made by an alien who'd barely studied human interaction, a dive into this man's insane mind and how he sees the world and how he's so goddamn bad at understanding human interaction. That sounds like a unique, valuable viewpoint. Which is something good.
I hope it was clear that I wasn't saying "how can a movie be good if its production values aren't good!" That would be baldly sophomoric. What I'm getting at and what I've come to believe is this: the whole "good bad" movies thing is facile bullshit, frankly. The best "bad" movies are actually good because they offer a fascinating viewpoint or accidentally stumble into making some commentary or are charmingly chaotic and excitingly amateur on a technical level. I've only ever laughed at or pitied movies that I truly thought had no worth, had no logic to their badness. But you take Repo Man, Dark Star, El Topo, Hausu-- these can easily read as "wrong" on certain levels, but you end up laughing with them and admiring their reach. They are good movies.