Mbappe has been one of the deadliest strikers for the last two World Cups and he won one of them and finished the one in Qatar as vice world champion. I think calling that nothing serious is wrong.
I absolutely agree that he wasting golden years of his career with PSG because Ligue 1 is not where a player of his level is supposed to play. It was different for Messi because he had his success already and some circumstances led him to play for PSG. But it is not like Mbappe should be blamed for not winning the Champions League. He has proven that he can deliver on the highest levels with 12 goals in two World Cups. I can only hope that he will soon make a decision to leave PSG and finally play in a better league, but here is really only the Premier League that would get the best out of him and maybe La Liga if Barcelona gets back to strength and perhaps Atletico Madrid as well.
Barcelona, Atletico, but not Real?! Did I miss something or did you just forget about Real Madrid, with which negotiations have been going on for a long time and most people assume that Mbappe will move to Real Madrid next summer?
A move to the Premier League, I think, is extremely unlikely since he won’t go to City because of Haaland, and there is no point in moving to another club where the likelihood of a Premier League title will be low.