Heads should have rolled after Anfield.
Everyone at the club, from the players to Bartomeu, insisted it wasn't Valverde's fault. Fine. Let's assume it wasn't.
Whose fault was it then? The only ones left were the players. And yet they refused to take any responsibility, and the club went into the following season with basically the same squad + Frenkie and another one of Barto's 100 million euro dick waving signings that he had no idea what he was doing with. Busquets, Pique and Alba are still starting to this day. They should have been gone after Anfield, especially since they insisted it wasn't EV's fault. If it wasn't EV's fault then it was most certainly theirs. And yet, no reinforcements in those positions. No plan to replace them. Nothing.
A proper elite team would have fired the coach, done a review of the squad from top to bottom and identified players that need to be replaced. At the very least Busquets, Pique, and Alba would no longer be starting the following season.
Our response (or lack thereof) to Anfield was disastrous, from top to bottom. From the president to the coach to the players. No one took any responsibility and no one made any attempt to fix anything.
Anfield finished this club.