1.0 He's tactically outdated: Almost all new elite coaches now employ the high press, high defence line, passing from the back and other new tactics but Mourinho is still stuck with his customary hoofing hopeful balls into the opponents half, no interest in keeping possession and controlling the game. Mourinho hasn't evolved tactically, he is still stuck in the past. In fact his tactics has gone extinct, you wouldn't be wrong to say his tactics is a dinosaur
2.0 His ego doesn't matter any longer: Mourinho at the peak of his managerial career was the gaffer with the biggest ego. He didn't wait to be sacked before leaving a struggling team because he had so much believe in himself and trust in his coaching system. He knew he can't stay a day without work, clubs were always queuing yo have him pen his signature on the dotted, he was the "poster man" of coaching. He resigned in October of 2007 during his first missionary journey at Chelsea after his team drew against Rosenberg at Stamford bridge. Mourinho now loses to championship sides at home then reminds the media the financial implication of sacking him. He can't just leave without getting his payoff, if he resigns, he may get little or nothing as payoff. In fact, he now waits to be sacked
3.0 He's too interested in defending: Since his arrival, Mourinho has signed a defender in each of his three seasons. Signing defenders itself isn't bad but doing so at the expense of other positions in more need of quality is disastrous. Manchester united doesn't have a natural right sided attacker and an adequate backup for Lukaku but Mourinho was more interested in splashing £60m on a 29 year old defender. Mourinho wouldn't mind signing "men of the night watch" to protect his defence if more than 10 outfield players was allowed in football. Mourinho hasn't realized you can't set up a team to defend for 90 mins, they'll buckle under pressure.
4.0 Second season league success : Irrespective of how difficult a league was, Mourinho was always certain of a league title in the second season. He won the league with Real Madrid in breathtaking fashion (most goals scored, most points) against the best Barcelona side in history. He is now in his third season at Manchester united and there's nothing to suggest he'll ever win it there.
5.0 He blames everyone else except himself after defeats: You won't see Pochetino or Sarri single out a player for criticism after a drubbing, Mourinho was adept at defending his players even when they fluffed their lines. He knew exactly how to protect his players from media tongue lashing after a thumping. Now Mourinho's is excellent at openly chastising his players, picking fights and slating them on the media. A far cry from what he initially stood for.

His park-the-bus approach to matches is archaic because most teams boast of many talented attackers. mourinho needs to work on his tactics

Osinamoney:
His park-the-bus approach to matches is archaic because most teams boast of many talented attackers. mourinho needs to work on his tactics

True, it seems he doesn't want to evolve tactically