Simple answer, change the coach. He seems to be over the top and doing more harm than good. But yes go ahead with the chat. That can't hurt.
This being said, I have a friend who has a daughter similar age who is good at tennis. He is always complaining about coaches not giving his daughter enough attention, being more devoted to other kids, his daughter not improving enough because coaches are not doing the right thing, ... You get the drill.
I think he exaggerates a bit is too critical and expects too much from his daughter, but I have never watched his daughter with any of the coaches, so can't really say.