3Nothing Bad is Ever Whedon's Fault
Even the finest screenwriters shit the bed. It happens. William Goldman, Oscar winning mind behind Butch Cassidy and The Princess Bride, also wrote the adaptation for Dreamcatcher. Did he blame anyone else for that crap? Of course not, he's a pro.
Alien Resurrection is just as shitty. But that's not Joss's fault. According to him: "They said the lines ... mostly ... but they said them all wrong," he said, regarding his script for Alien 4: KY-Shitfest in Space, before going on to say, "They cast it wrong. And they designed it wrong. And they scored it wrong. They did everything wrong that they could possibly do." So according to Joss, putting Michael Wincott, Ron Perlman, Brad Dourif, J.E. Freeman and Sigourney Weaver in your ALIEN movie is horrible casting. And the director, who also directed City of Lost Children, might as well be Helen Keller. But the writer, the guy who gave Ripley a robovag sidekick more annoying than C-3P0, and made the main villain a fucking Muppet Baby? You insult him in a dream, you better wake up and apologize.
Muppet Babies, they'll eat your fucking skull...
2Seriously, It's NEVER Whedon's Fault
We'll skip right past that bullshit line about electrocuted toads or whatever it was Whedon fed Halle Berry in the first X-Men movie. That was totally not his fault, either. The guy who writes Family Circus apparently did a dialog polish while Joss was coming up with new ways to get hot female co-stars to make out with each other onscreen (for feminism, of course.) Speaking of which, let's talk about Dollhouse.
Dollhouse isn't getting crappy ratings because it's a bad show with a goofy premise played way too seriously, centered around a vapid "actress" with all the personality of a petrified turd. It's getting crappy ratings because of FOX. Sure, the network mercilessly drowned the superior Terminator: Sarah Connor Chronicles specifically to give Dollhouse an undeserved second season, but FOX is the big bad here, FOX is the reason the show lays there like a dead fish week after week, only sporadically flickering to life, like how a caveman banging rocks together might accidentally start a fire. At this point I think the show exists solely to collect ex-Battlestar Galactica actors like Pokemon, so Joss can giggle and get them to sign his Hello Kitty backpack.