The bad luck due to the increasing number of player injuries has made it difficult for Ancelotti to formulate a strategy with the players he has. If this condition continues, it will be difficult for Real Madrid to maintain its best performance. The disparity in quality between key players and reserve players can affect the balance of the team, Mbappe presence has also not had a positive impact on Real Madrid front line, he has only been able to score two goals since defending Real Madrid. Ancelotti must be able to keep his team's performance on the best track even though he currently cannot play several key players. If he can manage the team well in difficult times like this, it will be very difficult to match the strength of Real Madrid when the key players can play again.
Calling this bad luck may not be the best term to use as at this point because i think it will be rather not exactly true because actually it's normal that when a team isn't in their best form they will suffer some set backs which isn't necessarily seen as bad luck because they can definitely bounce back to becoming their best form as they use to be all the while. For Madrid I believe it's a metter of time and one thing i can trust them with at this time is that they aren't going to decline so bad so at point of recovery it will seem as though there was never any set back.