Madrid are not completely in a slump because they are still in the top ranks and Carlo can still restore Madrid's performance if he finds the right tactics with the current players, Mbappe is not completely bad he can create important goals when needed Bellingham can also add a goal in this match so they can work together from now on for their clubs.
I'm not sure if Real Madrid has something to bring to the table any more. Today, Mbape improves and the following day, he used his hand to destroy the past and the future. Who is in that club that can do what Vinicious can do for that club right now, Rodrigo as alternative is out due to injuries and Vinicious is our for the next 2 weeks, that means they will suffer another 2 weeks of defeat, that means they wouldn't be able to proceed to the next step.
Barcelona is facing some challenges but they aren't as worse like the way Real Madrid is right now and as long as they have Raphina and Lewandowski as their forward, they have every chance of winning their next match, that's the difference between them and Real Madrid. This is the only chance they have right now to over take Barcelona but with what they have played against Liverpool, I'm not sure they can deliver anything for that club this season.
I don't really want to comment much about Mbappe situation in Madrid until he must have stayed in the team for a complelete season , he was brought in to the club to help the team and secondly, because of this kind of injury situation on key Madrid players, If he is very active like the way he used to be before, Madrid wouldn't feel the absence of Rodrigo and Vinicious much whenever they're not in form or out for injury or whatsoever reason that may keep them out of the pitch.