Maybe because after all, recently, Real Madrid has really had quite tough matches in a row. Not only in La Liga but in UCL. We see that their struggle was really tough against big clubs and in the end they succeeded in winning.
Real Madrid's UCL schedule against Bayern will take place in a few days. The hope is that their entire squad will really be in fit condition. So there is not the slightest problem with their performance. It doesn't matter that they are quite slow against other clubs, perhaps to prepare for the big UCL match so that all the players are fit.
Their match schedule is busy, so it's normal for them to experience fatigue and not only that, as you said, they also experience difficult schedules in a row, and that's definitely not an easy thing for them to go through.
However, despite their busy schedule and difficult opponents, they still showed something good. A coach's job will be very tested during times like these. The coach must be able to intelligently rotate players, and Ancelotti has succeeded in doing so so far.
Yes, this is always a problem and also a challenge for coaches or football managers to manage their squad very carefully. Because, all matches are important, but there are some matches that are much more difficult. So however, they have to prepare so that their main players are really in fit condition.
Anyway, in La Liga right now there is a real Betis vs Sevilla match.
For the temporary position, Real Betis is 1 goal ahead of Sevilla. However, it was still not safe, because Sevilla also showed quite good resistance. Yes, even though their attacks haven't been done yet, they are quite dangerous. However, this match, to be honest, was quite boring. Both of them didn't play aggressively, only the ball passes weren't significant enough.