My faith was undermined by the same sort of things that make people skeptics of religion in general. Part of it was, there was no real place for me in Judaism. Maybe if there was I would've hung in there, but I was attracted to the social-justice aspects of Judaism, and I was attracted to the prophets.
Like they used to say about Joe Montana, he threw soft because he couldn't throw hard. He was successful because he didn't try to do what he couldn't. I couldn't rock out harder than everybody, or overpower people with mastery like Jack White of the White Stripes, so why try? That's why I've always worked harder on words.
If critics were harder on the musicians that they love, there would be better songs. But as they grow older and they lose their talent, critics refuse to let them know that and protect them, and they get to the point where they put out music that just isn't up to the levels where they've already been.