Also, I am reading that the particular tactical mistake most ManU fans identified is the fact that Mourinho went 4-3-3 vs ManCity. To support this view, they also cite that Mourinho's Madrid got beat by Barca 5-0 when he used that formation. After that, he apparently also went 4-3-3 and the games were tighter.
Whilst I agree that the formation has impact on the games, I find it hilarious that these ManU fans want and expect to treat ManCity like Pep's Barca even at home. This is a total small club mentality, "we are the underdogs" that Mourinho likes to promote, and quite a few ManU fans seem to have accepted their inferiority
It is as if 4-2-3-1 has never beat 4-3-3. It is as if the only way to stop a Guardiola team is to overload midfield, park the bus and make it tight
I actually am not sure if they understand what this tells about their team and manager. "He's done it with Porto, he's done it with Inter, he is a proven winner... just didn't overload midfield and didn't make it tight".
It's a fucking total hit and hope. Whether Mourinho plays 4-2-3-1 or 4-3-3, it doesn't matter when his team retreats in their own half or hoof the ball. His "tactics" was playing agricultural Pepe to hack Barca players. Who fucking cares if it was 4-3-3 or 4-2-3-1?