Sometimes being a coach can be tough. You work your butt off to support teachers as they bust their butts to move students towards mastery. There are those who seek your help and others who don't. There are those who need your help and others who resist it. But let me encourage you. For every one teacher who resists, there are two who want you. For every one teacher who says what you've done isn't helpful, there are two who say you've given them just what they needed. For every one teacher who discredits your suggestions, there are two who at least see the process all the way through.
Mathematically, there are more you appreciate your work and support than those who don't. I dare you to remain focus on the greater good. Don't allow the outlier to skew the data of why you are important.