For your consideration ...
Thinking a lot of this turmoil stems from some/a lot of coaches having their own kid/s on a team that they are coaching, giving preferential treatment and unbalanced times per players on the field. Then there are the feral youth/players that have no respect for anyone, and also play out their antics against opposing non-feral players on the field while their feral coaches turn a blind watching open eye. Then there are the referees that don't do anything to stop these actions such as kicking the bad apples off the field when necessary. One but look to the NFL as to where these yut get that message from.
First the blame goes on the parents. My kids played soccer and on occasion I got to witness youth football practice.
You are correct in one thing, lack of respect for the coaches and it has nothing to do with the coach and favoritism, these kids are undisciplined and completely disrespectful. They don't give any effort and want to be a star. All this is going on with parents standing around encouraging them.
I assisted a friend coach youth basketball and it was just as bad, certain kids wanted to be the next MJ or Lebron, they didn't want to be a player on a team, they wanted to just have the ball 100% of the time and then watch the other kids play defense.
Their parent would be coaching them from the other side of the court - to which my friend handed his clipboard over and told them to coach the team or shut the F up. They shut up.