As a coach you need to work on you teams ability to learn the game eg Baseball IQ
Winning is not everything at a junior level. As a coach you can only judge yourself by
how you players bring to the game what they are taught in training .
If you have not taught something at training and a player makes a error or mistake in a game without knowing the correct way to do it a coach should not get disappointed with the player but should address it at the next training session.
A good Coach should build character in his players to perform under pressure.