Ultimately my view is this:
Mourinho has fallen out with half of the squad, including the key players. He's fallen out with Woodward and likely other senior club people. He is taking the club backwards at this point and has been since last season. The fact we finished second just shows how awful everyone else was.
I don't see a way to fix this beyond replacing him. Even if we have an OK season and finish second again, it's just so boring to watch and never gets better.
The fact he wasn't backed in the market means the writing is on the wall, might as well pull the trigger sooner rather than later. The players could play so much better under someone else, I have no doubt about that.