Firstly you say we have been fastidious in carrying out due diligence, then you say the personnel are at fault for not carrying it out!
What exactly is the point?
IMO, since the days of Dan Ashworth, I would suggest we haven’t had a Sporting and Technical Director of Football who has had his ability, knowledge and skills.
He was very detail oriented, intuitive, competent, a perfectionist and had a conscious understanding of the causes and effects of running a successful football club, including dismissing and recruiting a Head Coach.
This detailed approach was second nature to him, unlike those that have followed him since. (The jury is still out on Luke Dowling). So, while we have a prescriptive due diligence approach and do so fastidiously, not everyone has the right level of intuitiveness and competence to undertake them efficiently, but more importantly, effectively.
So, the point is unless the individuals charged with recruiting a Head Coach are capable of a fastidious approach to robust due diligence systems and procedures, you will, more likely than not, fail. And you don’t know, until after the event, the full extent of their level of fastidiousness, which appears to have been the case with us in recent years.