moving to Real Madrid was the wrong decision in his life
It is a wrong decision but we cannot blame him. He mustn't expect to end in Real Madrid with a bad performance like this. Nothing wrong with the decision to move to Real Madrid, it should be his dream as well. I am sure he has done big efforts so far. But unfortunately, he seems to have complicated difficulties in Real Madrid. Not sure about the main reason, only Hazard knows it.
I agree it looks like Mbappe is more adaptable to Real Madrid, but the chances of signing Mbappe are very small.
Even if it is a small chance, it is not impossible.
We know Mbappe wants to go to a big club like Real Madrid. He also can make another history in the number of transfer fees if he moves. Real Madrid should spend a lot of money if they are really serious to sign Mbappe.