Real Madrid currently have 6 injured players that are their main players.
-Militao
-Alaba
-Carvajal
-Tchouaméni
-Camavinga
-Vinicius
These are important players so Real Madrid's performance has declined so it is natural that they often experience defeat and Mbappe is not entirely to blame, but he always fails to convert opportunities into goals, especially Mbappe's ego is still there where he always dribbles without seeing players who are in the right position to pass the ball.
If you look at the list of injured players that Real Madrid has, it doesn't feel fair to only blame Mbappe, especially since all of Real Madrid's injured players are important players, especially in maintaining the defense. Real Madrid's current inconsistency is partly due to the large number of injured players, besides that Mbappe has not found his identity, even now his mentality is being tested after failing to execute penalty shots twice in two different matches.
Yes, Mbappe needs time to adapt and I think people need to remember that it took Vini several seasons to become what he is now. I also understand why Mbappe has difficulty scoring goals, one of the reasons is because he moved from the style of play of League 1 to Real Madrid. I'm sure he will get better soon, just like Vini who had difficulties. But now, Vini is considered one of the best in the world.
Real Madrid's chances in the Champions League are indeed tough, especially with conditions like this with many important players injured, plus Real Madrid's current unstable performance. However, I am confident that with the many UCL trophies that Real Madrid currently has, it will boost their mentality when facing Atalanta later, especially since this is a very important match for Real Madrid so that there is hope to qualify for the last 16 via play-offs because in the remaining two matches their opponents can be said to be easy.