The most successful team my son played on had broadly dispersed talent - no superstars, but no glaring weak spots. My theory is that the kids knew they had to carry their own weight, but they didn't have to pick up the slack for another player, so no one pressed. Also, the team never quit, they just played on. The coach let the boys play the game. He was not a central figure that everyone noticed during the game. He usually did not call pitches. The boys played and the boys won, sometimes despite some coaching errors or errors on the field.
I notice a lot of coaches create a lot of distractions during the games, especially on travel teams. Seems to be all about them. It is hard enough to keep teenage boys focused without all the background noise.
Just one parent's observation.