I had pretty much the same issue with my own DD. I also gave up coaching . Come to find out I was the one causing the problem. I was so critical of everything she did. Even when she did what I asked I still didn't give her the credit she deserved. The worse her attitude got the harder I was on her. Once I finally opened my eyes ,I stepped down and it was like a totally different little girl. It was the best thing I ever did for the relationship with my daughter.
The more I think about it, especially after getting some great advice here, I know I am too critical of her. It kinda sucks to admit that.... I guess I'm the jerk.