Barcelona is indeed more dominant in winning the Copa del Rey but Real Madrid dominates the La Liga champions more so in my opinion Real Madrid is still superior to Barcelona, Real Madrid could win the Copa Del Rey but it seems that Real Madrid does not prioritize the title because Real Madrid's priority is the Champions League and La Liga is much more important to them and they have to give up one so they can focus more on bigger competitions.
If you look at the La Liga and Copa competitions, no one is more dominant, everything is still very open, both Barcelona, Real Madrid, and Atl. Madrid, and the winner of the Copa Delrey last season was also not one of the famous teams, but Atl. Bilbao who managed to bring home the Copa Delrey trophy, so I think this is still quite early and everything is still open and talking about La Liga, their competition is still very tight and Atl. Madrid also performed quite brilliantly so I think they can surprise both Madrid fans and also Barca, talking about the consistency that Atl. Madrid has is also extraordinary, I think this club must be watched out for by Madrid and also Barca, so I think the opportunity to win every Spanish competition, no one is dominating at the moment, it is still a dream.
Likewise, the Champions Madrid also did not perform well in the Champions League and what happened was the opposite, their performance declined and in my opinion they also cannot get that this season, as you said they will focus on big competitions but in my opinion every club will focus on every competition to be able to achieve everything because the important thing is not only focusing on big competitions in terms of the players that Real Madrid has I think they should be able to achieve a treble of trophies this season but if you think about it again it is very unlikely to happen because in my opinion their performance is not stable enough.