After the shocking loss, Mourinho gave a truly freakish interview as supporters were left bemused as a sloppy, lethargic and disinterested United exited Europe.
Is that [Nicolas] Otamendi, Kevin De Bruyne, Fernandinho, [David] Silva, [Raheem] Sterling, [Sergio] Aguero, they are investments from the past, not from the last two years, do you know how many of United players that left the club last season?
Mourinho went on: "Life is good, I have an fantastic job to do".
Had United gone on the attack and lost, while plenty would have moaned that Mourinho should have stuck to his principles and seen out a narrow win, because football fans are fickle like that, many would have appreciated seeing the team give it a real go. But to lose in the fashion that United did is unforgivable for many.
He tweeted a separate photo of himself playing for non-league team Alfortville in the Paris suburbs back in 2010, along with the words "always believe in your dreams".
He can not rely on much backing from fans who have never given him affection.
The Special One then made reference to fan reaction after the game and squarely put the blame for a lack of success on United's recent purchasing history after the exit of iconic ex-boss Sir Alex Ferguson. Those fans clapped him down the tunnel.
The longer it went scoreless, the more nervy it got inside Old Trafford.
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The best atmospheres of the season were during the back-to-back 3-0 defeats to Liverpool and City, the fans remaining behind the team, even if the chants in support of Moyes had stopped being sung.
Increasingly, the storyline is that he is not the right fit for United.
There was space in front of United's back four, with holding midfielder Nemanja Matic isolated as Fellaini roamed, and a team with more incisiveness than Sevilla would have capitalized earlier than they did. But it's still not bright enough.
This is also Conte's second year at Chelsea - and it could be his last after an unsettling season in which he has regularly sniped at the club's board for not signing the players he wanted in order to build on winning the Premier League. Not that Bayern were tested in the last 16, brushing aside Besiktas, who had chosen to cash in on their center-forward Cenk Tosun rather than committing to trying to reach the quarter-final.
Chelsea players applaud the supporters at the end of the Champions League round of sixteen second leg soccer match between FC Barcelona and Chelsea at the Camp Nou stadium in Barcelona, Spain, Wednesday, March 14, 2018.
"And said: "I know how you play, that you are aggressive". His gloomy demeanour and his obsession with squabbles through the media, more than his on-field tactics, provide the greatest source of negativity in Mourinho's management.
The underperformance of the Premier League, by some way the richest league in the world with 10 sides in the world's top 20 by revenue and five in the top 10, is mystifying.
They have been kept apart in the quarterfinals, which take place this weekend and see United with the most desirable draw.