Xavi was a very smart football player and I see now he is a very smart manager. It couldn't have been easy to rally Barcelona, they did it. How did Barcelona get to second place in the league? It happened because Xavi motivated the players with his smart strategies. Now in the summer, I'm sure he will find the best players and put them in the Barcelona jersey.
There is an opinion that the Tiki Taka strategy is outdated and of course it has a certain result, but not above a certain level - roughly speaking, in modern football you cannot claim titles using this strategy. In addition to the coaching problem, Barcelona still have financial problems - I have not heard any news that would say that they were able to somehow settle their huge debt.
It seems that you did not respond to my message, but to the message of my interlocutor
By the way, I don't know if Xavi is smart or not (it is quite possible that he is smart), but the fact is that he does not have an objective picture of the world - his entire career (golden time) fell on the triumph of Tiki Taka. After such a life experience, it is naive to believe that he will be able to objectively assess the possibilities of this strategy in modern football.