Some will say 'there are no bad students, only bad teachers'.
That presumes a teacher has students, i.e. people who are there to learn from them. Not people who are there because someone made them be there and only care about whiling away the time required of their presence with various distractions, personal and interpersonal, not caring about or even taking delight in the disruption of the learning process some present, who actually ARE students, attempt to undergo.
As the number of students drop in favor of the number of disruptive time-wasters, who still get counted as the former, of course the failure rate is going to spike. And as always, those responsible for the problem take none of the blame, while those who actually have to deal with the problem take most if not all of it.