If that helicopter hadn't gone down, this club is not only still PL but probably in Europe and possibly in the CL.
It ended there that evening, it just took a while to bleed out.
Its difficult to blame the son for not being the man his father was. Its not his fault he doesn't share his fathers dream / vision / investment, in this club even if he was the man his father was.
The fans all know the tide turned that day and the fans are decent people who don't want to inflict that on the guy who has suffered enough & is still here when he probably should have drawn a line under it some time ago.
He should look to sell, there's no disgrace in it, its not his failure, its just how lifes cruel game dealt the cards on this one.
That's my two cents on why the lack of anger and demand for accountability in the fanbase.