One thing i understand about El Classico is that expect anything. A competition where home or away matters less. The come back in the second Leg at Camp Nou proved so many things. It was almost the same sets of players in the firs t leg of the Copa Del Rey. The only change was the formation and starting Rordrygo and sending F Valverde to Midfield which i don't see as excuse for Barcelona losing such amount of goals. But this is El Classico where anything is possible.
That exactly how the classico is. It can go in ways no one expect. Even Madrid never expected to win 4-0.
I think Barcelona were a bit better in the first half but they were not clinical enough and with the kind of injuries they have they should have made use of every single opportunity they get. They did not and they got hurt.
Madrid, on the other hand were clinical. They buried every chance they got all thanks to Benzema.
Now Madrid are the favourite to win the Copa del Rey because they're are most likely to win Osasuna in the final. It will be good to hold on to something because they league is gone and there's no guarantee that they'll will win the champions league.