I think Salah is 100% cooked and is one of the main (if not the main) reasons we have been so poor.
A good example popped up at the beginning of the second half. Szobo, Gakpo and Hugo were pressing high and tight and almost forced a turnover. The ball found its way to the GK, who made a very simple pass to the LB, who then skipped right past a jogging Salah. The press literally disintegrated when the ball reached the left back. Salah doesn't press nor does he track back...he just kinda jogs around hoping to get the ball in transition. The only problem with that strategy is that Mo has no burst and any average LB can easily lock him up on the break.
For the 2nd goal, Salah again let the LB walk right past him with the ball, and then didn't follow him. The LB had all day to pick the perfect pass, which he did.
Slot needed to bench Mo weeks ago and has refused. Meanwhile, Chiesa runs his ass off but lives on the bench. If they do fire Slot, they need to bring in someone with big enough balls to reward industry over legacy.