How can a film starring Peter Dinklage, Ryan Kwanten, Danny Pudi and Summer Glau sit on a shelf for two years?
It's popular for writers to grumble about the development process, and I've certainly got plenty of horror stories, both mine and those of my friends, about things that were said or done during notes meetings. Honestly, though, if you're paying a writer, then that's an expected part of things, and it's something that good writers learn how to handle with grace and with wit.
The true enemy right now, especially as the old filmmaking model starts to disintegrate and new models seem to spring up almost weekly, is the shady world of international financing. The absolute worst notes meeting I've ever had doesn't begin to compare to the amoral, unethical, and downright criminal things I have personally observed during the financing part of making a film. One bad deal can haunt you for years, and trusting the wrong person to be part of the financing team can absolutely destroy not only your film, but you as a filmmaker.