You were trying to be the nice guy.... Well you were the nice guy.
I don't know what I would have done in that situation.... Depends on my mood I guess.
As for the girl being afraid. Two stories, same basic thing.
My sister wanted to learn to shoot. So when she was in town I took her to the range. Before we went in I showed her how to manipulate the controls on the three weapons we had.
Beretta 22, Browning 380, SW .357.
I loaded one shot in the 22 and gave it to her.... After the one shot she started the shake, I took the weapon from her and she started to cry. I put the weapon down and asked if she was OK. She told me that it scared her. I told her she did not have to keep going. She said she wanted to learn to shoot... I told herthat her crying does not show that. She calmed down and I loaded one more round into the 22. Same thing happened, but not nearly as bad.
Long story short eventually she was firing till the little 22 was empty.
Then we did the EXACT same hing with the 380 and then the EXACT same thing with the 357.
The difference was at each stage I remained calm and told her that we could stop at any time. Today she owns three handguns and shoots twice a mth.
First time shooters I like to take them to an out door range. When you fire a weapon in a closed space you can feel the discharge more. That is what most first timers have an issue with. It is not the noise, but the feeling.
Second story was a girl from up North that a buddy sent to me for skydiving training. She had 15 or so jumps, but hit a wall and was no scared to exit the plane. Why she suddenly got scared I don't know, it happens sometimes when a normally good student suddenly loses all confidence. So I took her to the windtunnel in Orlando, and then directly to the Drop Zone. On the ride to altitude she started crying (What does crying help?) The pilot had to give me a second pass, but she finally got out and had a good jump.
She never did jump again however, and I didn't pressure her. She said she felt like a failure, but I told her she was not a failure, she had done more than most people ever have done.
Lessons:
1. Some people are just not meant to do things.
2. The right instructor can help but not change that.
3. No single instructor is always the right instructor.
4. Being an ass almost never works.
Someone should give that guy that list and highlight #4.