I don’t think he would have any problem performing in the French league at all, it’s really low standard there and he has too much quality for not being success. Once he get going he would be performing.
But the only problem I could see is, he used to play in Barca system which is build entirely around him, with everything go through him. Whether he would enjoy the same freedom in PSG with Neymar and Mbappe up front, and his new teammates who are not familiar with his approach, would be something I am not too sure about. He has a habit of strolling around the pitch when without the ball, and being always the focal point of attack for his team. These things are not common in any other team except Barca, and would need more time for his teammates to learn how to cover his back, and to adjust on how to play alongside him.