I think Real Madrid will take the charge for the second leg and will come to the final because in the first leg they played so brilliantly, although Carlo Angelotti did some rotation to the team, like he used some young players, and that's why Real Madrid did not make enough goals. Because of misunderstanding, the player didn't get any better chance for scoring. Especially Vinicius Junior misses so many open scoring chances, as well as Jude Bellingham attempting a few shots but failing to score.
But anyway, Real Madrid played brilliantly, but unfortunately, they got only one goal. Now the second leg they will need more effort, like they need to be very careful to beat his opponent otherwise, they can be eliminated from the Copa Del Rey.
I will not worry because they will play at home with much support from fans. Real Madrid will win it with at least 2 different goals. I admit, Anceloti is a coach who always makes a best step to rotating a young player as he wants them as club investment. So it's no surprise if he is brave enough to give young players a chance to prove their ability. There is still have Vini and Bellingham as a motor of attack, but it's not so visible as when they playing with core players. But I think this result is pretty convincing for the team that apply an offensive strategy. Yes, it still needs to be polished to be more measurable on the next match.