We all know the main problem with Barcelona is not a coach; Barcelona's financial problems are the reason why Xavi couldn't function as well as expected. So I disagree with you that Xavi was relieved of his duty as Barcelona's head coach because he was incompetent. Barcelona played with most of their young players this season, which didn't give Xavi a choice but to work with them because Barcelona was not financially stable enough to buy good players. With the addition of Mbappe to the Real Madrid squad, Barcelona are likely not to win the La Liga title because they don't have a squad that can rival Real Madrid for the La Liga title when the new season starts.
We are aware of it, but it seems like Barcelona is not aware of that at all. They keep trying to put some managerial changes when in fact the problem is with the financial situation.
Koeman, Xavi, Flick none of them could do anything about this team because they lack the finances to make this team better, Xavi winning the title was a huge shock and they should have kept him for that reason, but even with Xavi, or any other manager in the world, they are he going to get better. Hell, Real Madrid just got Mbappe for free, can you imagine how great you have to be in order get him for free? Who did Barcelona get for free? Ilkay? I am sorry but Barcelona doesn't have a manager problem, it has a money problem and that's not going away anytime soon.
The Barcelona management should better face the reality concerning the situation on ground, I don't really believe Xavi was the major problem here, but the finances. However, they should have kept Xavi a bit to work with they have, even with time this players in there will blend well with each other if they had left Xavi to continue, Anyway let's see what Hansi Flick have to offer, if he proves Xavi wrong and turn things around for the club and bring back Barcelona to its lost glory.