I just completed a training course. The material was potentially interesting and valuable, and the instructor certainly knowledgeable. Unfortunately the speed of delivery was too fast for me, the assumed prior knowledge was too detailed and the focus was on skills not concepts. And, of course my technical environment was not configured correctly. This all led to a frustrating experience.
On the bright side it did remind me of how some students must feel, when I go too fast, assume too much prior knowledge , don’t explain how things fit together, and ask them to use technology that doesn’t work as expected. That itself is worthwhile learning.