Warning: Tinfoil Theory (so don't take it too seriously)
I don't have the stats to back me up on this but I believe Jose got a lot more defensive against top sides away from home after the 5-0 drubbing at the Nou Camp in 2010. That was after the best start by a manager in Madrid's history (or something like that). He said after that game that he felt 'impotent'. In the eyes of so many people that defeat and Barca's dominance during his time in Spain was the great triumph of all that's good in football against so called horrible nasty defensive Mourinho. It doesn't help that people loathe him. The only ones who support him are his players, ex-players and the fans of his current team. The amount of sneering I read about him in the press afterwards was unbelievable. They'd been waiting for years, waiting for him to slip up so they could stick it to him.
Not one major revered figure in football seem to have anything positive to say about him or his style of play: Cruijff, Beckenbauer, Charlton and so on. He really is football's version of the Miltonic Satan and he seems to encourage it - the eye poke, hounding referee Frisk, Eva Carniero, taunting Wenger. I wonder if post 2010 he decided to fashion his teams as anti-Pep, anti-Barca - but how far can this really take you? Klopp, Conte, Poch and Pep are his main competitors and three of them have been influenced by Bielsa and that whole school of football who play very differently to Mourinho. He has an awful record against Klopp and Guardiola.
It seems weird but I think he needs some self belief. He can't keep this up - this anti-football approach can't work away from home against the very best teams. Maybe he feels he can never match Guardiola's style so he chooses this instead. Better to rule in Hell than serve in Heaven and all that.
Edit: Funnily enough the one great ex-player who like Jose is Maradona and he was no saint either.