From watching football, playing players out of position or in systems that don't suit them will always make a team worse.
Reguilon, Ndombele and Lo Celso in particularly all look worse than their full potential shows. Hojbjerg is excelling because we gift the opponents all the ball, so he sees alot more of the action.
Kane and Son of course excelling because they are the only attacking players getting the ball and creating consistently.
Issue is, Mourinho is stubborn. And his stubbornness has cost him his job before. I don't think it'll cost him his. Failing to a win a trophy is probably the thing that'll do that.
But if he would play players in a system that suited them, gave them a bit more freedom and allowed them to make the opponents fear them, I'm sure we'd probably do alot better.
Earlier in the season we allowed Reguilon to attack quite regularly. Ndombele was deeper and we were taking it to teams. Then we sort of changed it so that Sissoko and Hojbjerg are now designated deeper midfielders and Reguilon is tasked to defend instead of doing what he does best.
But I also don't blame Jose for wanting us to play not to lose. He's right that if you don't lose, you sometimes win. Sadly, it feels like a long long time since we felt that winning confidence.