That is one thing.
The other thing to me is how I read coach's reactions when one makes wrong move.
Last season when he was trying to prove to us that Hendo is the best fit for no 6, he used to shout at Fabinho for any mistake he was doing in case he features. After getting the solution, that stopped.
There are times when Sadio and Klopp had sour relationship, anything that Sadio was doing wrong, Klopp was shouting. After they resolved their issues it stopped.
So my thinking is he will only react if he has issues with you, to me he was supposed to react to every mistake, tell the player what he did wrong on spot. Imagine how Bobby loses possessions due to silly passes, Salah loses possessions trying to dribble, or forces to score while a teammate is open, bad thing is how it keeps repeating and everyone seem content with it. You talked of Trent, same things repeating and no one tells him.
Imagine Adrian's goal, he was supposed to be shouted at when he did that in first half, I am sure if he had been, he wouldn't do the same mistake for the second time which almost costed us a point.
Last season we remember how Allison made some mistakes one game before playing Leicester, instead of saying he will improve, he told us to get used to him, fortunately Leicester did it, since then he has not made that mistake again, imagine if there was one to tell him how wrong he was doing it, it could never had come to that extent.
We need captains who can hold players accountable if coach can't do it, the likes of Roy Keane.
Otherwise this season is going to be one tough.