A fish starts stinking from the head. So you missed in your numbers the PIA top management. That a captain gets away with those sort of cowboy approaches is the direct consequence of top management style. If every manager looks the other way, will, at a certain point, lead to this outcome. That the CRM did not work and the Co was not preventing this has the same reason.
Number 1 and 2 is a distraction and has no relevance.
7 should have pulled the AOC long ago.