Yeah, seen the goal of Llorente, and Pedri probably has the biggest individual fault for that one. Though it was Gavi, but seeing the replay, Gavi takes over Molina when Balde goes in the center to handle Sorloth. It was Pedri that should have covered that position.
Gavi could have fixed it by ditching Molina who posed a less immediate danger and going there to block Llorente instead. Reading the game and recognize the position is exposed due to Pedri's error and move to cover it.
We have many things to correct on the defensive end. It's not as simple as blaming individually Kounde, or Cubarsi, or others. We have many players who are young and do not have the experience to read the game better.
2nd goal is also a collective error. Yes there is a bad pass by Kounde that started it, but still, it's a 4 vs 2 attack in favor of us. That turnover could and should have been handled much better.