Moreover, Barcelona's performance this season has been less stable compared to Atletico, but now everything has changed and the additional 3 points have put Barcelona in second place in the standings. I think Atletico must know that all teams are the same and must try to win and not just focus too much on their local rivals like Real Madrid. The additional 3 points are important to maintain stability and also create a safe position in top competition. 
I thought Atletico Madrid could make things difficult for Barcelona, but I was wrong. In fact I think like you, because they concede the ball too easily and it looks weak like in your picture. It seems Madrid have to learn a lot from Barcelona so they can make Atletico like a docile cat. It seems that Jao Felix became Barcelona's differentiating actor, with his anger he worked hard to make Simeone feel guilty about letting go.
Joao Felix only plays professionally like a player in general, where he is there he has to show his best performance, but this makes the club think more about keeping the player and not selling him to Barcelona because he knows the potential the player has, but this also depends on Joao Felix is he willing to return to Atletico Madrid or choose Barcelona to be the club he will fight for. It would be better if Joao Felix was at Barcelona because he feels comfortable there so that his performance stands out at the right club.