As you said above, from my perspective i'd add it was pure ego ('This is man utd, and i'm part of this so therfore i must be great) which created arrogance, then defensiveness which snowballed into further lack of self-awareness and an inability to show vulnerability and admit to their fallibility... typical leadership shadow stuff often seen by self in hindsight or more obvious from the outside. Leadership and culture problem. It's also part of the squad and quite natural for sports stars and managers.
ETH has shown elements of it last season pulled into the negative culture himself - although the hopeful and positive side of me believes he has the self-awareness and understanding, he just calculatedly chose not to run the squad/club through the mill in the media as it would have caused further problems and also put himself at risk. He wouldn't have won anything from throwing it all out there and still won't. Do your deep work in private. That's why in my mind we just had him repeating the same thing in pre-match and post-match interviews. He was consistent in his messaging 'stick to the process' and consistent in his negative feedback. To us though it would make him look naïve, lost, unaware, poor etc.
My two cents/ramble and it lines up with everything i've said about this squad and club, it was never a 2-3 year job, it's 5 years+ to shift the **** from the club.
Jim might not be jesus but he's shown a lot of solid leadership decisions so far and can see why the Glazers chose him over the Qatar bid.. the get to keep their fiscal fingers in and the club is in capable hands with effective business connections and workings.
Things look well in the right direction. Onwards into year 3.