I try to separate issues in my head. Mourinho messed up. That's a fact.
Pogba messed up. That is also a fact.
My problem is when we try to excuse one for another. Or when we mix things up. Pogba undermined his manager. I don't care whether or not he was echoing what fans were saying and it does not matter if the manager was popular or not. That for me, massively contributed to our overall poor performance this season. You are right, he should not have said those things in public. It was not his place to do it. He would never have gotten away with it under Fergie, Pep, Klopp, Poch or Sarri. I will never see a justification for it.
Why couldn't Pogba give us those performances during Ole's first few weeks, all season? Surely, those weeks showed that he has the capacity. Same for many of the other players. To say that (like someone here did) without Pogba we would not have even come sixth, is to me, ridiculous when, clearly, he was part of the reason we struggled in the first instance.