RTA Examiner review: Wrong way of talking while student is driving

I had a RTA driving test, where I was driving and I slowed down on the road because there was a car in frot of me and construction was on. Instead of examiner saying go ahead he yelled on a panic mode so that the student gets scared and fails due to which I missed a very small bump and she yelled again.

This is not the way of failing students. Let them fail on their own mistakes instead of telling on top of their voice.
It was 7 am in the morning so she had no reason to panic and tell beside me.

Not acceptable. Unfortunately I have to clear my test through galadhari. But I dont have good experience with this training school.

What can be done, pls advice.