yes I agree with you Cristiano Ronaldo's move had a lot of impact on Juventus' performance at the start of the season.
For your information, Ronaldo joined the Bianconeri for three years to be exact from 2018. Together with his squad, he managed to bring Juventus to two Italian League titles in the 2018-2019, 2019-2020 season. Not only that, CR7 managed to bring Juventus to the Italian Super Cup title in 2018/2019 and 2019/2020 twice. Then once lifted the Coppa Italia title in the 2020/2021 season.
Indeed, Ronaldo was productive to Juventus. His absence was really felt in Juventus when he departed to United. Is now certain that Ronaldo was their goal machine. But they Unfortunately lost him to Manchester United. If you observe closely, you will probably discover that the Old Lady were unable to compete for the League title this season. However, until they get an experienced and talented player to replace Ronaldo, they won't be able to win the Scudetto again.
After Ronaldo returned to Manchester United, Juventus suffered a huge loss, Juventus' appearance declined further because they lost the goal machine that has always been a mainstay in their front line. The money obtained from Ronaldo's transfer was used to buy Dusan Vlahovic from Fiorentina, Juventus really hopes Dusan Vlahovic can replace Ronaldo after his slick appearance at Fiorentina. Number 7 was immediately given to Dusan Vlahovic, but Juventus made the wrong decision, Dusan Vlahovic was not able to boost Juventus' performance and had to settle for finishing fourth at the end of the season.