1- if they leave you at the end of a season better than when you got them, you did your job
2-If they learned something about the game, you did your job
3- If they move onto a better team skill wise, you helped them get there, you did your job
4- did they have a fun time while working? You did your job
5- Did they and their parents have a fun enjoyable summer? You did your job
6- Did some say thank You Coach ? You did your job
7- Do some remember you as they got older and waited on you and state how fun it was ? You surely did your job.
Yes create more teams and make even one child better taking your lumps as you do, but enjoy the game and kids for their youth, don't steal that from any kid who desires to play....