It is very natural for a big team like PSG who has spent a lot of money to be so ambitious to win the UCL title and maybe they will continue to do so until that title can be achieved. This mentality problem will only come if the PSG coach is a person who has high integrity in football and that must also be accompanied by an attitude of players who are willing to fight together and not just think about the good times at PSG. However, not only that, PSG's management must also be filled with people who are competent in their fields and if so far they still cannot overhaul their management, of course winning the UCL will also be difficult. They have to be consistent and it is not an easy thing, especially if you look at PSG, this is a new big team on the European stage, so they will still need a long time.
However, I think some of the steps taken by PSG were wrong, last season they spent a lot of money buying several star players and targeting to win the UCL, but in fact they couldn't do much in the European competition.
And this season PSG is experiencing many problems, especially the drama of Mbappe not wanting to extend his contract anymore and since Luis Enrique took charge of the PSG team it has not made the team's performance better, quite the opposite.
If they want to become a strong team and be able to win the UCL, then PSG must create a strong team framework, like Pep Guardiola did against Manchester City and they must also realize that money can never buy a title.
The issue with Mbappe has long been closed, he is playing, performing for the club as planned and the conflict with the management has long been resolved. At the moment, the club management themselves said that now they will accept any decision of the player, even despite the fact that it is clear to everyone what this decision will be and where he will go, so you do not need to bring past problems to the current ones.