Personally, coach valverde has an unshirkable responsibility for the collapse of Barcelona. Valverde simply can't see what it's like to coach a giant team, from arranging troops to improvising. After winning 4:/kloc-0: 0 at home, valverde actually said that the score of 4:/kloc-0: 0 was still unable to ensure promotion. This lack of self-confidence has laid the groundwork for losing away from home.
The whole away game embodies the word "conservative". Valverde formed four midfielders to better defend and ensure that the advantage of winning at home can last until the end of the game. This conservative play makes Barcelona players completely unable to find their state and make frequent mistakes. In the face of the opponent's crazy attack, the situation quickly got out of control. When he was two goals behind, valverde had a chance to change the result, but he rejected the suggestion that Pique, the defense general, wanted to change tactics and strengthen the attack by replacing people.
"Conservatism" finally brought valverde the defeat of the game and made him lose control of the dressing room. The accusations of Messi and others have caused a huge gap between Barcelona coaches and players. Although Messi, as the leader of the team, also needs to bear part of the responsibility for the defeat of the game, the main responsibility can only be borne by coach valverde, paying for his poor performance!