Could it be themselves, first and foremost? Surely not. People being responsible for their own failings. What is this madness!?
If a player misses a clear opportunity to score, without pressure, then in that moment, who is to blame? The player, or the manager? If another player completes a low number of successful passes, then who is to blame? If a player, is dispossessed on the halfway line after a stupid attempted play, fails to chase back to atone for his mistake, then who is to blame?
There are many, many examples just from this season, where the individuals mistake has cost us goals, both for and against or where they have cost us players on the pitch. Where they have put the team under needless pressure. Far more examples of this that of the actual team failing as a whole. Of course mistakes happen, but they seem to be happening multiple times a game, from the same players. Have they forgotten how to play, is it intentional or are they just out of form? Maybe they are actually coached like that, that United spend hours a day training how to make mistakes.
Far to often we are undone by an individual error. Against Brighton, against Spurs, against Wolves. Far to often.