I do think that the best thing is for Mbappe to leave the club and go to real Madrid that is looking for his services, there he will have a better performance.
It is surely a good idea to move to Real Madrid because he will play with Ancelotti who is a much better coach than PSG coach right now. He also will play with quality midfielders and wingers with a winning mentality, and they will respect & support Mbappe as well. It is very different in PSG, he lost respect among the players there.