This isn't the Ligue 1. Maybe they are dominating their domestic league but here the challenge is much more serious. They had a group of death and they were nearly joining the Europa League.
The team effort must be improved much more. Mbappe can't carry this team most of the time in this competition - especially against top contenders.
PSG is just not good enough to actually win the Champions League trophy. I do not care how good they are in Ligue 1. They are not good enough to win the Champions League. And I have always said that they are never going to be ready for the Champions League because they always play in easy mode throughout the whole season. If they do not have any competition to face throughout the whole season, how are they expected to do well when they eventually face good competition in the Champions League? If you play the whole season in easy mode you cannot do well when you face bigger competition.
I think their biggest chance to win the Champions League title was when they had Messi and Neymar right beside Mbappe. Despite its being like a dream team the reality wasn't like that at all I'm afraid. Neymar got injured very often and missed a lot of matches. Messi and Mbappe still had really good statistics but this was still not enough to win the title here.
Now PSG have made big changes in their squad. They are going on with younger talents now. But we clearly see the bad affects of not playing as a complete team yet.
They need to improve their chemistry as much as possible to get ready for big challenges. Normally the transfers they have made for the attacking side are actually really good ones.