Liverpool were too unstable throughout the season, why this happened is not clear, but sometimes teams have recessions. At the end of the season, it looks like Klopp has found a way to approach the players and the team has found its game, because at the end of the season they were again like the old Liverpool. How they start this season, we'll see, Klopp requires players to give everything in every match, it's hard to keep up with the whole season, so the team needs fresh players.
When you sell one of your best player it usually do affect the team just like we saw when Real Madrid parted ways with Ronaldo they were unstable for some time before finally regaining their selves. Same thing happened to Liverpool when they sold Sadio Mane it affected them and even Salah could not save them. They sold Mane and the players they bought couldn’t perform to Mane’s standards, I don’t blame them because it’s not easy to adapt to a new club, they need time to settle and find their feet. Also Liverpool’s midfield is a mess currently and it affected them, fabinho and henderson are wearing off already they are getting old and needs replacement or support. I’m glad Kloop brought in Mac Allister he will be a huge boost to the team.