Critically, these are also the same set of players that got results away to Liverpool, Arsenal, and Manchester City. If they are capable of that, how could they be so sht as we are led to believe to struggle against Southampton? Perhaps it was pure luck and true divine intervention that we got those results. Or perhaps rationally, the setup of the team is more suitable against teams that are expected to beat us but stinks when we are expected to win.
Regards this bit, you're just backing up my point.
If this team is capable of a performance against the likes of Liverpool and Arsenal then yes, they should be able to also do it against Southampton and Brighton.
Same formation, more or less the same team, they are all playing the same game.
The reason they don't is that they are complacent, lazy and arrogant, and take teams such as Saints for granted.
Brighton are a very good unit, they play attacking front foot football. They didn't come to Old Trafford to defend. Our team though, they just didn't put in the same intensity and concentration as they did against Liverpool.
It's on them.