In all seriousness, what's the major issue here?
Because it's either he's sending them out with awful instructions, or they're not following them.
And I actually think it's the latter. For starters, he's got too much of a successful track record to suggest he's tactically inept.
But then, the crazy amount of individual errors they make, and the constant attitude they have makes me actually think the players are the problem. Mourinho is at fault here for recruiting and not motivating them, but the players need to take a lot of the blame here.