If Mbappe cannot control himself and cannot lower his ego, then it will be very dangerous for him. Keep in mind, his current team is Real Madrid, not Paris Saint Germain and Real Madrid is a strict team so he can't do whatever he wants, unlike when he was still in the Les Parisiens uniform.
At Paris Saint Germain he had that privilege, but at Real Madrid he did not have that privilege. I'm sure if his attitude is unpleasant and he can't change it, then Real Madrid will not hesitate to throw him away, even if he is a "star" player who has very good abilities.
He must be able to adapt and lower the ego that he has often shown, all for the sake of his future.
I am a Real Madrid fan and the truth is I am not very happy because he is from Madrid and that is the reason, he can create differences and disparity in the team but I think what you say is a great and very valid argument, also as time goes by the player begins to mature more, in the Eurocup we saw again how he did it, and the football system itself made him teach a lesson, something that was not even his fault, but with what happened to his nose it set off the alarms, in fact I hope he is okay and that there is no danger, but these types of experiences make a good player mature in many aspects.}