I'd say the documentary was more about things on a philosophical perspective instead of a musical one. That would probably not have interested that many.
The best bits were when it focused on the music, how songs evolved and the method behind the writing of them. But on the whole, it's good, could've been so much worse.
That's funny because I know of guy just like that. He loves himself because he thinks he's attractive and apparently gets all the girls (even though that gender hates him too).