It's not that complicated - the reason fans want Jose out is because -
Jose is more suited to getting the best out of players like Lukaku, Zlatan, Perisic, Willian, Matic, Fellani,Mcguire, Mctomminay, Sanchez the old LW, Pogba in half his matches and anyone else who has good genetics. All these players suit each others game much more because they do alpt of the same thing.
You switch the team around then we have players like Rashford, Martial, Shaw, Sanchez the Cf or RW, Pogba on his more natural technical side, Pereira, Mata, Herrera, & you could argue alpt of our youth team look more suited to play football in this team (Chong, gpmes) than the team above with felliani.
Jose after 3 years & 3 months have shifted from using team A as our main tactics & players whilst using team B as our squad rotation - to now using team B as our main team and then using team A as our squad rotation.
He has basically wasted 3 years to get to use something we already had - ditching his old plan because it was not backed by the board & rightfully so.
Jose is not the man to take team B forward - he has never managed a team like that, never managed a team without a target man and to expect him to suddenly be the best guy to coach such a team is pure delusional.
And its fairs enough - people might be like - well why don't we give the time for Jose to build team b out better 'we can't just assume that he will fail because non of his ex teams has incorporated such players' - the fact is I'd rather give a manager from Bournemouth or from our reserves time to build a team with these players because ultimately it is what they want to do & you can see it in Jose's ever worsening I DGAF about this team face - apart from a few goal celebratipns that anyone would do.
If Jose is to continue here then he should go & build team A - build a team that gets the best out of Lukaku & Fellani. He isn't the best man for team B.
Why alpt of our fans talk about other managers is because Pep, Klopp, Zidane, howe, ppchettino, would all attempt to get team B better & would have done so the moment they signed the contract. Instead we had a manager & the first thing he did was sign a 35 Yr old Ibrahimpvic & told Martial & Rashford that they do nothhave the ability to be his forwards.