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. And he seems no longer feels confident and less motivation to play with PSG players. With this situation, the best solution is to leave the club.
He won't have a place at real madrid fans heart.
You know what? The pain is too heavy after the last season betrayal , he is the player-manager at psg tho so no matter how everyone hate him in the club , he has that power to demote anybody which yeah it's kinda awful but he has that capability. Mbappe will stay at psg for very long time for me and real madrid will a bit hard to find the same quality player in the future.