There was nothing impressive about PSG big win and Mbappe hat-trick in this match because after all, the opponents PSG faced were also a team that didn't know what league to play in and also played in which league. Because ya, after all, there is no record about Revel playing in what division of the league and based on existing records too, that Revel only played in the Coupe de France and I think that is clearly a bad record.
Therefore, playing against PSG is definitely not a worthy opponent because after all, PSG clearly has better quality. Also, this big win has absolutely no impact on PSG performance in Ligue 1 because anyway, there was no impressive resistance made by Revel in this match. Clearly, this is a team that is very different in terms of quality for all the factors involved.
That is where remorse should kick in for Mbappe. He could have won several individual awards by now for being the best player in the world, but for as long as he stays at PSG he won't have a chance to compete with the world's best players that play for Manchester City, Real Madrid etc.
This transfer saga was exciting at times, but the bad part about it is that there was a talent on the line, a player risking the whole career and the potential legacy for money. That is his situation. He should put an end to that as quickly as possible and move on. He has enough money now. It can't be about the money and I think people around the world would be rolling their eyes if he unexpectedly decides to stay even longer in exchange for another billion euors.
PSG winning by a huge scoreline against a team that people just have not even heard the name of is honestly not an achievement for PSG in my opinion. And I absolutely agree with you @hahay that they were not a worthy opponent for PSG. I don't think this win actually means anything to anyone. Of course, the loss for the opponent was absolutely humongous. But I don't think PSG should actually be proud of anything that they have achieved from this match. Because we don't see this performance from them in the Champions League. And even they will agree that the Champions League is the competition that they actually care about the most.