You're overrating Mbappe. Mbappe doesn't control games, only very few players in the world can control games. Messi and Neymar are the ones off the top of my head who can do that, the latter is also a superior player compared to Mbappe. Since you're a PSG fan, I assume that you know that is Neymar who has been pulling all the strings for the attack since he arrived. Neymar has a lot of flashy moments, but what people might not realize is that he has silently become the best playmaker in the world. His passing and vision have become legendary.
Neymar, and of course Messi, possess the football IQ to be able to control games, Mbappe doesn't have that. Mbappe relies on his speed, that is why he thrived under Poch hoofball. Galtier is now introducing a more possessive based style of football, this is why Neymar and Messi are thriving and will continue to thrive. They play best when the ball is at their feet, with Mbappe it's the opposite. Don't make a mistake about it, Mbappe is quite poor technically, especially compared to some of the best ever. Remember when United beat PSG 3-1 in the CL 2019? That Mbappe performance was hilariously bad, constantly tripping over his own feet, constantly misplacing passes, and dribbling the ball out of play.