You can't expect people to do what they haven't been trained and developed to do.
People enjoy doing things they know how to do well.
Rectifying it begins with appointing one of your strongest board members to serve as Coach Manager. It is critical that the YSO appoint a Coach Manager to oversee the Coach Development Program. The ideal person for this position is someone with significant coaching experience who enjoys people and communicates easily with them. Schedule training sessions and other meetings. Communicate the YSO's values and culture to the coaches.