Yes, the players who come can sometimes be better and can be worse, it all depends on their suitability to play for the club itself and how the coach manages the game, but I understand that every club choosing players to enter the squad must hope to improve their performance so that their recruitment is not in vain because what they recruit is not just any player but players who have potential, so clearly Juventus, AC Milan, Inter Milan are certainly trying to perform better than this season and compete in the title hunt.
I agree with you wakier, it's important that the players adapt well to the team and that the coach knows how to manage the game in the best way
However, i also need to see if there's more to it, it requires the entire corporate side behind it. For example, at AC Milan, this side failed because the coaches and players weren't bad.