A lot of people don't do well with the pressure of an expert watching them, when they are not extremely proficient with a task. I think it's great that new owners are taking a class! They are getting the advice of an expert, rather than relying on a friend, or someone who may have not much experience than they do.
I would demand my money back if they said I had to go home after 3 mistakes. I took the class last year, & I know it's not cheep, but it is necessary in Texas if you want a ccp. I went to class with only 1 mag for my brand new kimber .45, & ended up borrowing 1 for the part where we had to use to mags in shooting.
I would rather see the people like you described in a class room setting, getting good instruction, & help on their 1st experience than on the range next to me by them selves trying to figure it out as they go.
I don't like it when old people drive, & get in my way, but hey, they have to get around too. I have to be courteous to them ,& respect their wrights even if I don't like it.
Even people who don't know squat about guns have a right to try & protect themselves.
You had the good fortune of seeing newbies get their feet wet, & how to help in the event someone ask you for your help in learning how to shoot. Count this as a really good experience, & look for a chance to use your new experience to help the firearms challenged people of America. Spread the power, & pass the ammo!