I think United looked very good a couple of weeks ago. You're only as good as your results though, and Mourinho is infamous for collapsing when the going gets tough. The whole point of appointing him was to get United to play football again but they currently look like the same team van Gaal bored people to death with. Most of the moves he made in the transfer window seem to have backfired. He brought in Bailly to shore up the defence, but he looks witless and tactically flawed. He insists on playing Rooney in midfield, so Pogba gets positioned way too deep (did anyone notice the distance between United' midfield and forward line today? Zlatan dropped down 30-40 yards to pick up the ball at times). He's benching Martial whose form is all gone now. He has done the same to Mkhitaryan, who is now injured on top of a deflated start.
Ibrahimovic and Rashford look like the only attacking players worth a tenner in that squad, and ideally they'd compete for the same position. I'd be worried right now if I were a United fan.