Not true
There were actually two trial court judges involved, Judge Greer and Judge Baird. Both were subsequently sustained on appeal - multiple times.
And since some 38 other judges ruled that neither "screwed up," the only conclusion you can reach is that they didn't.
Michael Schiavo did exactly what he believed was the right thing to do - to honor Terri's wishes and not let her mindless shell of a body continue on. If he was obsessed about anything it was about seeing that her wishes were carried out.