Just the commercials looked bad. I can suspend my belief of cities floating in the sky, or hanging in a canyon on another planet, but giant mobile ones on huge tank treads that "eat" other cities? Give me a break! And the constant shots of a girl with a red face cover got annoying because you don't know who she is, they don't give any hint of what she looks like without the mask, and there's nothing about her that makes you interested in her or her story.
Someone smoked some really good dope to write those books, because their bad-writing factor is kind of on par with Dr. Who and Douglass Adams' stories.