The reason for PSG they spend lots of money but they can't get anything in the champions league is mostly because they didn't have a good manager and they just bought superstar players while PSG didn't have a balanced team, this situation made chaos in PSG that's why they players couldn't have a good atmosphere in the team to have good performance.
If this is intended as a joke, I'll happily enjoy it while munching on some popcorn. However, if you're serious, it seems like you're endorsing PSG's questionable behavior. In all honesty, Galtier deserves a break. Just take a look at the short duration he was given – it was barely a year and two days ago when he was appointed. Expecting him to win the Champions League in such a short time is unrealistic. In my opinion, his performance was decent considering he managed to secure the Ligue 1 title for the second time in his career. Instead of abruptly sacking him, PSG should have granted him more time. If other clubs followed PSG's approach, teams like Manchester City would never have achieved their current successes.
Whoever controls PSG has a hot temper, Messi left, Neymar is also considering the same thing and Mbape is also under some pressure to renew their clown contract or should live the club, they think they can win the Champions League, if they continue with this attitude towards players, there Champions League winning is uncertain because it can never be anytime soon.