Well, that was terrible. Both Lindelof and TFM to blame for the goal, and you could argue De Gea could have been better positioned.
McTominay isn't a defensive midfielder. He lacks the positioning, passing and tackling ability to be one. When Bruno is higher up the pitch, and Pogba isn't really putting in the shift, we are extremely easy to bypass in midfield as a result. Fosu Mensah has had a very poor game, as well - out of position, can't cross, can't tackle, can't win 1 on 1s. Take James lack of footballing intelligence and composure and our right flank is non-existent.
Going forwards, it's not been easy to link up against 2 banks of four from Palace, and both Bruno and Martial are being crowded out of possession.
Let's hope we see a different team in the second half, but concedeing looks more likely than scoring.