And rightly so IMHO considering the context at the time. In the end, it worked out for him.
Everyone could see he was more talented than Oscar, at least end product wise.
It was the game at old against Moyes where Mourinho was very negative and played him as a striker, and Debruyne was poor that sent him out of the team.
Mourinho's biggest achilles hill is been very inpatient with young players, and trying to shoehorn them and expecting them to do a job regardless.
He might be successful in the short term but long term success of a club lies with making sure you have a core of young players playing in key position. Imagine a Chelsea team with KDB, Hazard and Salah.
As much as he has been an instant success in most jobs ( not yet at United IMHO), long term he isn't the person.
I hope he doesn't make thesame mistakes with our crop considering how the transfer market is becoming difficult to get a half decent player.