What is the theme in Missing Links by Rick Reilly?

Toward the end of the novel, Ray says that having come from "America's Dysfunctional Family Era", he was required to blame his father for all of his shortcomings, which is something Ray has done with passion. Every shortcoming in Ray's life, in his mind, can in one way or another be traced back to his father and the emotionally brutal way Ray was constantly criticized for not having enough "want to."