I believe it's because CASA attracts the narcissists of aviation.
It is also the last bastion of semi decent terms and conditions for those who never cut it out for a major airline.
So you have a combination of unfounded ego's, bitter and twisted poor me's and narcissists running the regulator.
Half hate us with a passion, while the other half think they know better.
The only solution is to can the whole show and adopt the FARs or register airframes across the pond and adopt their licencing system under the trans tasman agreement.
Everyone knows CASA is a joke, and they know we know it.