Irrespective of what we think of him, it's fair to say that he won two trophies - one of which we hadn't won before - and took us to a (distant) second last season. You can feel sorry for him in that Ewar Woowar allegedly hasn't got him the centre-backs we needed - but on the other hand, the midfield is of his construction (Matic, Fred and arguably the show pony) and that's where we're currently really lacking.
I really hope this doesn't descend to non-stop media blamestorming. We haven't lost a manager this way since BFR, or even the Doc.
One thing is certain - the question of "surely Jose has to be a better manager than X, Y, Z if you give him a chance" has been definitively answered.