I think it’s a team problem. Klopp’s teams never rely solely on talented individuals to deliver - the whole team creates space for each other. With the individual decline of Mane, Salah and Firmino, Klopp started relying more and more on midfielders running beyond the front three to help - hence Elliott or Hendo or Trent being asked to play as these roaming box-to-box players - this worked up to a point when other teams realized we’ve sacrificed too much defensively and everything came crashing down.
Anyway, no reason to rip in Salah I think - he has declined the least among our great front 3, he can still be effective, but he won’t beat teams all by himself. With a solid structure behind him, he will score goals. Also for those who say he doesn’t do anything useful during the game - until Nunez came on, Salah was the only one regularly making runs in behind (and often being found by teammates). It didn’t come to anything in the game, but this kind of outlet provides oxygen to a team - remove it and you will be back in the late Rodgers type of tippy-tappy football without any threat or penetration.