Look, the simple reality is that Guardiola inherited...
Aguero
de Bruyne
Sterling
D. Silva
Fernandinho
That is an incredible bunch of talent to take over, a veritable bounty of skillful and important players.
Mourinho inherited...
Rooney
Mata
Rashford/Martial
Fellaini
Herrera
There are some good players there, but the difference to what Guardiola inherited is huge.
Added to that City have spent 75m more than United in that time, and it's insane to not understand what Mourinho is saying.
He's come, he's won trophies, got us back in the CL, got us top of our CL group, 2nd in the PL with a point score that would usually see a team top of the PL!
If you wanna see him take on this City side then the board have got to back him because the guy has delivered!
Sacking Mourinho is not the answer - backing Mourinho is the answer.
I would advise you to read an article on The Times called "Man Utd must back moaning Jose Mourinho", by Henry Winter that makes same assumptions and agrees with you view.