That's right, one or two players at a club who have good individual qualities will not be enough if they are not supported by an even squad depth within the team. Financial factors play a very important role in creating a club with a composition of quality players. Even though it is not guaranteed that you will win in every competition you take part in, your chances of winning are slightly greater. Inter Milan almost won the UCL last season, but they have to admit that Man City has a more complete squad depth and a genius coach, of course this cannot be separated from budget support from Sheikh Mansour pocket.
This season Serie A is represented by Napoli, Inter, Lazio and Milan in the European Champions League. Inter, who was runner-up last season, is said to be the Serie A club with the most potential to go further in the UCL this time. It could be that a surprise will happen again like last season, who knows, one of the Serie A clubs can bring home the UCL trophy despite their limitations.
The quality of a team is truly strong if the qualities possessed by the players are equally good, no one is better or no one is worse. But their Serie A teams only have a main squad that is so strong but their substitute players don't have the same quality as the main players. So the problem for them is that if the main player is absent, they don't have a replacement who has the same quality. We saw this last season when Osimhen was injured and Napoli did not have a replacement who could truly replace his role in scoring goals.
In contrast to Manchester City, they had many good players last season, from main players to substitute players, which made them successful in winning the treble winner last season. But I am sure that this season's Serie A team is stronger than last season because Inter Milan was able to show good changes for their progress in Serie A or the Champions League.