The fact that the United board did not support Jose to the same extent as other managers are being supported was inevitably his demise. I supported him because I think he was doing whatever he could to benefit the team.
I honestly think you're in fantasy land a bit here. You guys signed a ton of players under Mourinho, including world class ones, and 2 expensive CBs that were supposed to be the answer to the defensive problem. Just because Mourinho couldn't realise that investment doesn't mean he wasn't supported. I hardly blamed Woodward and co for drawing the line on CBs after getting stung repeatedly like that. To me the biggest mistake Woodward etc made was re-signing Mourinho on a new contract. What a disaster that was.
And the 2nd statement, yea na... we all know that ultimately Mourinho looks out for himself. He always did, and he always will.
United have not signed a ton of players. From when Mourinho started, United have bought 11 first team players, which includes Zlatan (gone), Mkhitaryan (gone), Dalot (19yo) and Grant (3rd GK). City = 15, Liverpool = 14 and Arsenal = 13 for the same period.
Bailly and Lindelof were 22yo when they signed, so its unlikely that they are to be world class defenders from the first season, regardless of money spent. We have spent a lot of money, yes, and I agree that some of them have not performed. But not every signing does. And how many are those that you would expect to be in a Mourinho team? Maybe 5? Over three seasons? That's not supporting the manager.
Secondly, I just think that Mourinho looks out for himself by trying to win games and trophies. He has high expectations. He expects players to be disciplined, to counter attack quickly and to win the physical battles. And when he doesn't have players that can do those things, then both the players who can't play that way and the manager who doesn't win games lose out.
I ultimately think that Mourinho was just the right man at the wrong time. The players needed to buy in to his methods and the board needed to respect who they had hired.