OK. Can see what you are saying re competency proceedings. Surely it would be in the best interests of all concerned for the school to be a little more communicative (transparent) regarding this. If parents are unaware of timescales then it is inevitable that they will begin to become impatient and more complaints are brought and so on and so on.
Fwiw, re parental complaints that have been made regarding issues individual to their child and who have met with HT and CoG (HT will not see anybody at initial stages of complaint without HT present - this has always been the case not just since these issues have arisen) - deadlines, action plans, further meetings arranged etc. etc., the complaint is being considered by HT & C0G as resolved. This is because parents want what is being offered so accept terms. However, it is these promises that are NOT being followed and hence the ongoing frustration, hence the fresh complaints surrounding the same issue and obv hence the HT incorrect allegations of bullying.
It appears a hopeless cycle that we as parents will never break until we remove our children from the school and walk away. All that does then is leave the same issues and problems to resurface at some point in the future which of course it inevitably will.
Admission - I agree entirely with your comparisons to industry.
All a bit of a nightmare really as if you knew us in RL, we are largely the most unbullylike people and to be labelled by someone as respected as a HT is very scary. We are just fighting (that's how it feels now) for the best education for our kids - can't see why that should create such a problem.