We finally win a game and he's in a bad mood and willing to make a problem for the team in service of his own interests. That's the issue here, nothing else.
Slots going to be asked about this, and it's going to be a thing every time he's benched, or subbed or whatever, and he's a player that could be very useful to us and we are spending a fuck ton of money on. I think it could be better for everyone including Salah if he realizes that managing his minutes may actually allow him to be the centre of attention more and get more goals.
Slot has enough problems right now without his most high profile player having a huge problem with being benched against some shit team we smashed.