My husband keeps telling me I need to check The Glass Castle out of the library. He said about the same as you about the parents.
I loved Jeannette Walls's book about her grandmother, Half-Broke Horses.
I'm reading Handle With Care by Jodi Picoult right now... it's beautifully written but the subject matter makes it hard to read for me. I think I would've had a much easier time of it before I had kids!
Btw the kindle version of Blaze of Glory is on sale until the end of March :)