2 sheds, you're very touchy!
it's a long time since I was at the college of knowledge but i remember a distinct variation in the quality of instructors - one or two were excellent and some were very definitely duff. open your eyes - can you honestly say that this isn't the case now? it happens in all walks of life - i'd be surprised if the college is any different.
and given the amount of stuff that a trainee has to take in during their time at the college, one or two examples in practical exercises is not a lot of exposure to something. you expect trainees to latch on to things (if they're astute enough) - i always thought that that was where the instructors could make a difference.
no smiley from me - if you're not prepared to accept that there are weaknesses in something, you're never going to improve it. is the college and its output perfect?