Indeed after Sadio Mane left Liverpool, the quality of their play deteriorated noticeably..... Although towards the end of the season they were able to achieve some good results... Let's hope that the new players can add some good moments next season and Liverpool will start playing well from the beginning....
No matter what kind of player is added to the club, it will always take some time for the new players to fit in when a team's top player departs. Even if Salah was there, Liverpool suffered after Mane went because the pressure was too great for him to bear. Salah had a lot of help from Mane, and the two of them carried the squad. Real Madrid experienced the same issue after Cristiano Ronaldo left; it took them some time to regain stability. Towards the end of the season everything began to go well they started winning matches and later ended up making it to the europa league. I believe next season will be different because new players would have settled and blend with the team through preseason matches.