I've seen it go many ways. Kind of interesting. Several kids played together on travel team. After middle school they all go to their separate high schools but everyone remains friendly.
School 1. At this school, the coach is overbearing, constantly focuses on negatives and rarely focuses on the positives, puts players in the doghouse, chew players out in public, etc... In short, all the players hate him and the parents think even less of him.
School 2. At another school, the coach has a top winning program. Works the kids hard, drill after drill, lots of running and working out. Football mentality. Has lots of talent to work with. Better not have more than a one game slump at the plate or in the field or you'll be riding pine. Too many players and not enough positions. So, you can guess how half the parents feel. Even those who are playing are not always playing where they want. But these are the types of things that come with a team that has too many good players. Someone is going to sit or not play in their chosen position. Other issues are that you better not play a winter sport that might interfere with spring conditioning. You'll be penalized for that. Also, players who play showcase have been penalized for not playing for the local legion team at this school. And while many may not like him, no one dares to say anything out loud that might get back to him.
School 3. Finally, one coach is described as not caring. Doesn't run much of a practice. Maybe they hit in the cage and that's it. Maybe one round in the cage and one round of infield, outfield.Hardly ever take bp on the field. No discussions or practice with pitchers, catchers, and middle infielders about situations with base runners on. Basically, makes a line up and walks out to coach 3rd.
Here's the interesting situation with School 3. The coach and his assistants are over the local jr. legion program. This summer, he kept 0 kids from his own high school and made his team up mainly from kids at School 1. Team was successful and the players and parents from School 1 really like him as a coach while his own players and parents don't.
So the grass is never greener regardless of the situation.