The greatest thing about Barcelona getting this win isn't just football or fandom, but also financials as well. Real spends their money to get the best players in the world and build a 1+ billion dollar worth starting eleven, whereas Barcelona just gets their players from La Masia.
Honestly, La Masia is an insane youth academy, I think 7 players were from there, obviously someone should double check that, I just "know" but I trust my knowledge there, I do not have a proof, I didn't check all of them, but if I am not wrong they had 7 players from la Masia in the game. That is insane and they still managed to beat Real Madrid with ease, and destroyed Bayern Munich as well. They are looking like old Messi days Barcelona once again.