It sounds like a very sad & very stressful situation, but is there something that makes you think that someone did "screw up" as opposed to this being some cosmic accident or "God's will"?
That is the issue we've been dealing with. As far as I'm concerned, everything is God's will. Does that mean He allowed this to happen or does that mean His will was that there were a series of oversights that contributed to my son's injury? Without going into detail, a cursatory look through the initial medical records point towards a series of mistakes that at least contributed to a delay in the diagnosis and treatment.
Believe me, it's with a heavy heart and conscience that we even consider this and we've received extensive counseling from much more thoughtful sources, both secular and religious, than one on this thread.