Obviously, any coach including Xavi wants to have many players in their team and they want to hire the better layer they have right now. But I think that's not something they can do that for the Barcelona team, because Barcelona is not in a good financial situation, and hiring new players can't be easy for this team with the current situation they have.
It is difficult for Barcelona in conditions where they are still hampered by financial problems but are required to continue to play well. This is a heavy burden actually for Xavi but Barcelona's current internal problems are still quite a lot and that is now compounded by several injured players who make it difficult for them to maintain their performance.
Today's match their attacking line was very blunt but I don't want to blame Lewandowski either even though there were several chances he wasted in this match but indeed Barcelona's midfield without several core players is also a little problematic which results in a lack of proper ball supply for Lewa.
I also don't really understand why they are forcing 1 striker which we know Lewandowski is quite problematic in his current form when there are other options by implementing 4-3-3 in this match which I think would be much better.