Guardiola failed at Bayern at the start, he inherited a team that basically scoring for fun and win everything under Jupp Heyneckes and Bayern went to UCL final twice with him. Guardiola took over and the score went down incredibly low and failing to went to UCL final even once on his spell. He even struggle to win the Super Cup against Chelsea that won the Europa that time. If you want to say Dortmund won during Heyneckes first season, try to look where is Lewandowski and Gotze at that time. Remember Bundesliga is basically a feeder league with other team is like an academy to make Bayern stronger.
This basically the same with Barcelona after Guardiola went to Bayern, the player is already good enough even without a top manager.
Guardiola didn't win at City in his first season but are City struggling that season, NO. So he is doing the right thing. Is Chelsea struggling, YES. That's the difference.
On Conte case I wrote before that he change a non-struggling team into one. His first season was great but because his ego, he decided to exiled Costa and chose Morata. He is still a great manager if he decides to throw out his ego and even with Morata he still won the FA cup.
In Mourinho case you will see later he will come back stronger. Why, because he is still one of the best manager in the world. How many time have Mourinho failed winning trophy at any club he has managed, NONE. How many player has grown under Mourinho, A LOT. One of them is currently Chelsea best player EDEN HAZARD.
Back to Sarri how many club has he managed, how many trophy he has won, how many great player he has nurtured, is he renowned as one of the best? The answer to all of them is NONE. Does his philosophy won his trophy, NO. Does he care for trophy, he never care for one. If you want to say Jorginho is a great player then a laugh is for your thought. Sarri is the same or maybe worse than AVB in his philosophy. At the very least AVB has won trophies at Porto.
Well anyway Mourinho might be back later anyway as a manager.
Ur tldr didnt mention where Mou learned his lesson. Its not like he is a new manager
Oh by the way when we were incredibly 10th or 12 on that season...mou inherited his own champion team of previous season.
By the way..wasnt Ancelotti was sacked at Bayern coz last time i checked..Pep didnt get sack. Talking abt failures here.....