On the bad student issue: if you are talking about motivation and the desire to learn, yes, that is where our opinions align. I've always considered my task to be not so much as to teach English, but teach the desire to learn English, to motivate my students to learn and read on their own, for their own enjoyment.
But the question here isn't about motivation, is about giving them an assignment and explaining how it is done. I asked them if they understood the directions, I tried to harbour an atmosphere where they could always raise their hand and ask if they did not understand. Now, if the student still doesn't understand the directions after being told them repeatedly and encouraged to ask if unsure, what else can one do? Telepathy not being an option, of course.
Also, nice touch with the Miyagi quote. Really classy to just imply I don't know how to do my job.