We’ve been through similar experiences and know how frustrating it can be. Fortunately, none of it seemed to hurt our son in the long run. Sometimes it’s hard to sit back and let everything run its course, but I’m glad we did. I really believe the right scout will see your son on the right day, if it’s meant to be.
Continue to be helpful and informative with scouts when they call, but refrain from any negative comments about the coach or his program. Encourage your son to be patient, supportive of his teammates, and coachable. These “tools” are as valuable as any reading on a radar gun.