I have been married for over 11 years and my wife think I'm a lunatic when it comes to driving. I have never been in a car accident in my 20+ year of driving mind you. But she is a very careful and soft driver while I like to "enjoy my ride".
I think what the OP posted is more related to being in a relationship that the actual act of driving itself, it would definitely help to talk to her calmly and let her know how it actually makes you feel when she makes these comments. Communication is key, unfortunately it took me over 10 years to figure that out
Good luck and thanks for sharing!