I got a new driving instructor about 5 weeks ago (my first one became unavailable), and at first I did think his instructing was quite direct and strict, which I did find a bit stressful. When we weren't driving he explained things easily and slowly, but I thought that it is quite important for the instructor to be strict when driving, because it is potentially dangerous. It does sound like the instructor is being a bit scolding, but if those are issues are as important as the instructor says they are, then I would just ask my instructor to fully explain how they want you to do something, so you know for next time (rather than the instructor telling you off for doing what you thought was right)