I think Barcelona will have to wait until the end of this season to sign new players. It's hard to find good players right now. Each player is currently under contract with different clubs. Nowadays, to think about new players for Barcelona, a lot of money is needed which Barcelona does not have at the moment. As you said, Barcelona have not been able to sign top quality players in recent years due to the club's current financial crisis. But many are not willing to accept these things. These things many people without trying to understand, are blaming Xavi and expressing their displeasure with a coach as skilled as Xavi.
Even though Robert Lewandowski can be said to be a new player at Barcelona, in reality his presence brought victory only at the start, whereas currently conditions cannot bring victory to Barcelona, even though he scored a goal in the 33rd minute, which shows that Robert Lewandowski is still trying hard to score goals even though Barcelona is experiencing quite critical internal problems.
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I don’t know why you guys put it this way, but Xavi or Lewandowski is not Barcelona problem . The squad is struggling with injuries, the club is too broke to get squad players and they have to rely on teenagers for a bench roles
That’s not a coaching problem but management problem