Duane lost the election because a few reps traded votes to get themselves a good deal. The Delta MEC were the big horse-traders. They surprised the whole BOD with a last-minute (previously unannounced) candidate for First-VP. That act put all the positions in play and deals were cut. It was ugly to watch.
I agree that it was ugly to watch, but you can't just put the blame on the DAL MEC. Vote trading and back-door deals were going on among virtually all of the A-carriers.