They were not encouraged to quit. They were asked by the current AD to stay. They were tired of the putting up with parents that thought they knew more than the coaches. Running the wrong offense, running the wrong defense, not playing this kid, playing that kid, why's my son not playing.
But why are we talking about the former coaches? We need to worry about the new coach and how we can support him and learn from the past and do a better job this time.