Sounds like an angry ex employer.
Winning districts is something last time I checked. Making Nationals win or lose is a bonus. Losing to the number 1 and 2 teams at that age group in the country is expected. Winning against them wasn't.
He gets results, what top level coach isn't using his or her best players? You play to win that's how AA works and every player on those teams know it. But I'm sure you already know that right?