Another problem arose when Paris Saint Germain had 3 star players on the front line, and instead of being able to improve the team's performance they were busy with their own problems. In my opinion, this also happened because perhaps their coach at that time was unable to build good relationships between the players, which resulted in a conflict that could be said to have been prolonged until finally the 3 players actually left Paris Saint Germain.
IMO, at that time PSG seemed to have an instant desire and it happened very briefly when they brought in star players in succession but didn't pay attention to the coaches they brought in at that time and on the one hand, for me the composition of PSG players was very irregular so even though they had players star but the performance is still the same as having only 1 star player.
The conflict is actually just a matter of player composition as I said before and it's not perfect, using star players but not being able to rotate players well, which creates problems that the players may not reveal.
Another fact, as you said, is that they also couldn't do much in the Champions League. They are the same as clubs that we have often seen before, where they cannot compete closely, especially when they face clubs that have the same strength as them. In the end they had to taste failure even though they had a star-studded squad in the composition of players.
Paris Saint Grmain must be able to get rid of that habit, because in my opinion they are also capable of competing even without star players, as long as their squad is even and they can work as a team well.
Well, from this discussion we know that competing for the UCL title must have high quality performance and quality performance cannot be built instantly, whereas the PSG president wants it instantly by bringing in star players but the coach is not very good at managing the players well.
So that these star players will continue to leave PSG who cannot accept the long process of being able to create high quality performance and now PSG is just realizing that building a strong team to compete in all existing competitions, all of this takes a very long time and requires very high consistency.