If a person is not happy when they look at themselves (not just physically) they seem to like to project the issues they have onto someone else - ie. It's xxx's fault that I.... Primarily I think this is driven by the fear of having to confront how they behave and accept that they are responsible for the things that happen to them.
Mind you, bad things do happen to good people all the time but we all have a choice with how we deal with those things - blaming others just leaves us in that place, no opportunity theremto dig ourselves out while we think that way.