PSG team management could not collect anything great from a player like Lionel Messi. In fact, I think the PSC team coach does not know how to play Lionel Messi. However, if Kylian Mbappe ever leaves PSG, the team will collapse.
In general, PSG has never depended on just two players and if PSG did depend on just two players, it was clear that the team would collapse because the team did not respect the other players in the team. But for next season what PSG really needs is a great young player even if he's not a star, because the PSG team can't keep hoping for one or two star players who aren't young anymore. So PSG must be able to find great young players in the transfer market before next season starts.
Why did you decide to blame PSG for not getting anything from Messi. This is hypocrisy. When Neymar didn't win the Champions League for PSG, they said Neymar failed despite large amount of money being paid.
Mbappe came and didn't win the world cup and it was said that he failed on his mandate.
Now that Messi failed, you turned it that PSG refused to get anything from Messi.