I don't know Leggy, right now these players are playing within the shell they've been given.
I knew we lost the second I saw us start with five at the back. Mourinho is happy grinding results but these players are not suited to beating opponents like that and the manager needs to acknowledge it. Lukaku is a waste of time if he can't get touches in the box. Martial and Rashford are wastes of times if they have to spend all their energy defending, and never get the ball at feet facing goal. Mkhi is a waste of time without ball. Herrera is a waste of time if he doesn't have a player to work the ball with (i.e., a Mata).
You can even go stretch it further and argue that Valencia and Young are a waste of time if they can never get forward. Jones, Bailly, and Smalling are a waste of time if they're asked to sit in a perfect structure and wait.
Mourinho setup a team to nullify Chelsea and effectively shackled our players. Chelsea sniffed blood and took it.
Mourinho has scored 1 away goal in 900 minutes against "the big six". That's atrocious and I think he has to wear the blame for that.