Good question; not sure.
My IOT flt cdr was a total w#nker (note to prospective cadets - If this happens to you, do not say this to his face in week 3 if you want an easy life), and another almost got 10 of us killed.
However, ALL my flying and ground instructors were at least good, and most excellent. This seems to be a rarity, so NUAS 81-84, 3Sqn Cranwell '85-86, 3 Sqn Valley '86 and 234 sqn '87 were, apparently the exception to prove the rule.
I did the AIC at Newton, and thought it was very well run. I think you need the QFIs to tell you what the problem was. I should think the Sqn Boss has a lot to do with it.