I agree, he is still very young, he played with the best players of the time at PSG, why should he regret it? Being at Real Madrid makes him feel better and he will do everything to achieve success at Real Madrid in the coming seasons. Although he started badly this season, he is currently the top scorer in the league with the goals he scored. Maybe if Real Madrid was in better form, he could have scored more goals.
He has chosen his own path, moving to Real Madrid was the best decision for him even though at that time PSG had offered him a new contract. This season he has been unlucky and is in danger of not winning a trophy at the end of the season, but he has been the most productive debutant for Real Madrid.
There will be major changes in the Real Madrid squad after the change of coach, next season they will come back with new strength to make up for this season's failure.
Real Madrid will really do their best to forget this year, I am sure of that. Because they had a lot of games to forget in Spain, in the Spanish Cup and in the Champions League. This year was very bad for Ancelotti. It was a bad experience not only for Ancelotti but also for the players. For example, Mbappé, who came to Real Madrid to win the Champions League, will almost end the season without winning any trophies.