Well the thing is that Mbappe often is good in the big games. Whether it is the World Cup back then or any other big competition. This is why it is so bad that he plays in Ligue 1. He is a guy who should play in the Premier League in a best case where he has difficult games almost every weekend. Being the match winner in Ligue 1 doesn't mean too much.
I hope that he will find his way in a different league next season because that's where he belongs.
I expect the same thing in Mbappe career, if he moves to the EPL then Mbappe will form a new axis with Halaand, like the era of Ronaldo and Messi in La Liga. The competition between the two in one competition will become a topic of comparison, who is better than the two. However, we all know that Madrid is number one to get his signature, It seems like Mbappe chances of moving to the EPL are very small, last summer Liverpool, Chelsea, Arsenal and Man United were reportedly interested in recruiting him.
It is difficult to imagine PSG performance if Mbappe left them, even though they will still dominate Ligue 1, it will be very difficult for them to win the European Champions League. I think this speculation will be answered next season, when the transfer market opens and Mbappe will decide his fate.