Hands off!
The instructor should take control only when it is absolutely necessary to demonstrate and explain but using the protocol already outlined.
You are the one learning and you should be doing the flying. Maybe a frank word directly with the instructor should happen first - could easily be resolved and a good relationship formed afterward.
His actions could be over enthusiastic. Make sure that he realises that his abrupt take-overs are sapping your confidence. If he dosn't respond then follow the previous advice.....................