I think pointing out Liverpool's aggressions without acknowledging what Everton got away with isn't telling the whole story.
Everton set out to find out where Atwell's line was. Pickford never saw a card in the first half for his antics, which ultimately worked. Two minutes were added, and we didn't even see them because of the fracas caused by Decoure reacting to Liverpool ignoring Richarlison for rolling on the ground yet again. I'll admit that the Brazilian finally probably hurt himself, but is the tale of the boy who cried wolf not available in Portuguese? Even his own teammates didn't believe him at first.
Richarlison should have seen red. Gordon should have seen red for multiple dives. It was by no means a stonewall penalty, either, as some are trying to insinuate. He stepped on Matip's foot, not the other way around. He rag dolled when he felt an arm. It's the Jamie Vardy special, but Gordon isn't Vardy. Yes, Jota should have been carded for his lash out, Mané could have been sent off.
Salah has absolutely become softer. If you look at his earlier time with Liverpool, he was much better at staying up. He also got mugged on a regular basis without much reward. I think he adapted poorly, overcompensating and becoming weaker at staying on his feet. However, saying a borderline call going against Gordon would have gone his way is weak speculation at best, not backed up by the evidence. I'm sure we could all dig up examples of Salah getting wrecked in more clear-cut examples than Gordon's latest grass stain.
Everton showed up to push the boundaries. Time wasting, shithousing, diving, chipping... When that behavior loses a side the benefit of the doubt in the referee's eyes, that's a risk that a side has chosen to take. EPL referees are generally awful at their best, and they have outsized personalities for the job. Knowing that and expecting them to be robotic in the face of a side actively trying to deceive, push, and make the job more difficult is poor planning. Those actions have consequences, I'd say they backfired. Everton and their fans need to accept that playing Atletico Madrid's game without their talent on the pitch or in management will come with results commensurate to their relative talent level, not Atletico's.