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.
It is true that one of the factors of Real Madrid declining game, due to the absence of many core players. Vini is one of the players who can change the situation in Real Madrid game without Vini, Real Madrid front line looks less aggressive. If you look at the next match played by Real Madrid in the Champions League where they really need a win to improve their performance in the Champion League.
So the absence of core players will certainly be very detrimental to them so far. Ancelotti hopes that mbappe will be more consistent in his performance because so far Mbappe has found it very difficult to bring victory to Real Madrid. He also failed to score a goal at the penalty spot, I assume that Mbappe will suffer the same fate as Hazard and that's just my assumption.