Talk to your child and find out Why the child does not like the coach. Then, based upon that, make some suggestions about how the Child can approach the coach at a practice (before or afterwards) and speak with the coach about the “issues”. It may simply be a small style change or a small misunderstanding. If that doesn’t work, then politely ask to speak to the coach before or after a practice for a moment. You then may better understand the “issue” and then re-discuss this with your child. You should Not discuss anything with the coach in the presence of your child. Good luck.