Birdemic is worse than The Room in almost every concievable way. It may actually even be worse than Manos: The Hands of Fate because even at least that movie has an ounce or two of "redemption" in it.
Birdemic is just terrible on all levels of pre, during and post production. Nothing is done right. Well, okay, he picked a hot lead actress, every thing else is just utterly terrible and it sounds like the production was a nightmare to do. (At one point when filming they're shooting in a park and during shooting park patrons were interrupting the shot (since they didn't get a license to block off the part of the park they were filming in) and the director was yelling at people about messing up his movie. The actress told the director he couldn't just yell at people who weren't working for him, director got upset and ended up sending an All-Caps filled e-mail to her pretty much saying he'll only be directing her by proxy through the lead actor from now on. The lead actor and actress share the screen for the bulk of the movie. Which means after this incident the director dircted the actress by saying, "Alan, could you tell the actress to [do this]." while the actress was standing right there!
There's some speculation on whether or not Birdemic was intentionally done to be bad in this manner, I don't buy it. I'd argue that it's very hard to make a bad movie on purpose like this because it'd take real-talent to sell it especially when you factor in the commentaries and other BTS stuff.
For all of it's faults The Room actually has an ounce of "merit" to it. Sure it's got a Soap Opera-ian plot, bad acting and 75% of the scenes in the movie have no impact on the plot (ex: Lisa's mom having cancer) but at least it was produced. There's an ounce or two of art-direction to it, some beautiful establishing shots of San Francisco and there's something of a story and a plot behind it.
It's similar to argument I make for "Manos" that there's elements of a "good movie" there that could've came out in more competent hands. With better actors and a couple more drafts of the script The Room could pretty much be your average Lifetime movie or some art-house piece of crap you never see.
Birdemic has none of that. Not one, single, thing is done right in Birdemic. Nothing. Something as simple as not wanting to show the brand-name labels of candy section is pulled off (in spite of all the other branded packaging that's clearly seen) in this movie they simply blur-out the candy section. They do this rather than strategically placing the camera at another angle so the candy isn't exposed or doing something as simple as turning the candy wrappers over or covering them in a manner that the names aren't see. Nope even something as simple as this the movie fucks up.
One of the minor-characters' actor quit in the middle of shooting so she's written off the movie by being killed while taking a dump.
Ugh. It's just terrible. It's hard to say which is the "better bad movie" in terms of entertainment value just by watching it, I watched The Room with a friend of mine last night who'd never seen it before and there's just those universally bad moments like the Flower Shop scene where you just have to watch it again to "grasp" it. Him and I were riffing on it as much as Mike, Kevin and Bill did. I could say Birdemic could easily be the same, offering a lot of material on it's own too, but ugh.
Anyway, get Birdemic and watch it. (It's available through Netflix, though not streaming) I'd recommend watching the director's commentary (oddly with as terrible of audio as the movie itself, this director had no grasp of the center channel it seems) and certainly watch the actors' commentary they riff on it pretty good too.
And, of course, get the Rifftrax, even the "host segment" at the beginning of the trax and the riffing over the end credits (rare for RT to do) is golden. It's probably the most "MST3K-like" they've ever been.