Xavi has brought Barcelona much more since his arrival and regarding this season Barcelona's performance which cannot be better than last season is quite natural because Xavi Hernandez does not have strong support from management to build the Barcelona team and indeed Xavi cannot be blamed for this. what is happening to Barcelona at the moment.
In fact, what Xavi did made Barcelona improve because without financial support it was actually much more difficult to build a stronger team. Relying on B team academy players is not a solution but Xavi has no choice and he even managed to bring Barcelona the title last season.
Xavi Hernandez's departure at the end of the season will certainly be quite detrimental for the team and will have a negative impact on Xavi Hernandez's coaching career. I am sure that if Xavi trains the right team then he can achieve quite a lot of achievements, in my opinion he is a coach who has quite good tactics.
For this season and the past few seasons, Barcelona is just a big name that is slowly fading and this team is no longer considered to compete fiercely in the UCL.
The decision has been taken and Xavi will leave after this season ends and Barcelona must find a way so that they can bring in a new, better coach. If not, the club's condition will be much more problematic and usually a change of coach will affect the team's competition because adaptation and changes need to be made. Xavi is the right coach but the lack of what he wants makes it difficult to build a team.
Barcelona must find a way to prevent the club's big name from fading and the long history they have gained so maintaining it will be much more difficult. Now they are in big trouble because the club's finances have not improved and they have to look for options so as not to cause much bigger problems in the future.