Real Madrid are currently performing very poorly in La Liga. But I think one of the reasons for this poor performance is that they are currently focusing more on the Champions League. However, despite their poor performance in La Liga, Real Madrid are in a good position. That is why Real Madrid is more focused on the Champions League and wants to ensure victory in the quarter-final match.
I can't agree you'd called that real madrid has poor performance in la liga. Real madrid will not be placed in second place if it has a poor performance in la liga. The only problem is real madrid is always losing against barcelona. The inconsistency that was already faced by la liga was making it loses la liga trophy caused barcelona to be able to take full points from real madrid. Real madrid was focusing to the UCL caused by it had no chance anymore. To be honest, if real madrid is still having a chance the problem is if it does not even reach 5% of chance for madrid to winning la liga.
Putting its strength into something that can't be won will be actually useless. Ancelotti was putting UCL as another important trophy that needs to be won by madrid. Madrid never had an easy game against chelsea. The match against chelsea gonna be a tough game for madrid.
There is also another problem related to the attacking line. Real madrid can only rely upon benzema while benzema can't regularly play for real madrid due to the injury.
Ancellotti was ignoring so many suggestions to buy a good attacker last transfer season. This is also giving a huge impact on the performance of real madrid caused by benzema's back up rodrygo was not able to perform so well.