Mbappe may not be liked all that much by some fans now, but that dude scored so many goals and brought so many great victories to PSG and that should be the most important part. I believe that he has done what he could for the club, and the club just couldn't put a team around him that could win the UCL eventually.
I believe that as soon as he joins Real Madrid, he will have a chance to win it because Real already goes there without him, wouldn't be a shock if they dominate for a few more seasons. If they do not ruin the club somehow, they could actually have a great future, their whole team is quite young, and winning back to back a few times in the next 10 years isn't really out of the picture for them considering the talent.
overall he has done a very good job with Paris Saint Germain, he made a big contribution to Paris Saint Germain during his time in Paris. So he shouldn't be hated for that reason, the only reason why he is disliked is because he decided to leave Paris Saint Germain.
He has a good future if he really joins Real Madrid. There he can achieve something he has wanted all along, achievements in the domestic league and achievements at European level, in this case the Champions League.
However, he also has to go through an adaptation process, and with the abilities he has, he should be able to go through the adaptation process quickly.
With the abilities he has, Mbappe can easily adapt to any squad, because the coach will adjust his strategy to maximize Mbappe potential. If there are no obstacles such as injury, Mbappe will definitely be able to adapt quickly to his new team. If Mbappe goes to Madrid, the adaptation process will go even faster, maybe the process will be the same as Bellingham.
While strengthening PSG, Mbappe has given all the best from himself, only in the Champions League, luck has not been on their side. It is clear that PSG fans have to thank Mbappe for his contribution while strengthening PSG. Although on the other hand, fans dislike of Mbappe because wanting to leave is also understandable, slso from a business perspective, this decision is very detrimental to PSG.
Dreams must be worked for, Madrid offers a way to make it happen, and Mbappe certainly won't waste it. The Champions League trophy and various other individual awards are closer to being achieved if Mbappe lands at the Santiago Bernabeu, a guarantee that PSG cannot offer in order to convince Mbappe to stay longer at the club.