Sad to say this, but this will be symptomatic of our play this season against the stronger teams, and part of the blame will lie with Mourinho. Our biggest problem by far last year was our attacking front 3, in both creating chances and scoring them. All we did to improve was replace a pretty good striker (Ibrahimovic) with a slightly better one. We did nothing on the wings - all we have there is promising talent but no genuine top class attacking talent to win games for us. Mata, Rashford, Martial and Mikhi are all currently second tier attackers, whilst our rivals have players like Mane, Aguero and Hazard who are top level attackers.
We really did need to sign someone who can actually dribble well and stretch play, even someone like Mahrez who's a natural dribbler would've been a help I feel in giving us a different option. It doesn't help either that our full backs aren't playing well at the moment either and not giving us any attacking width (expected of Darmian, but not from Valencia).