Coaches matter a lot, my friend. Maybe you should be aware that Real Madrid was playing badly under Zidane this season and when Carlo Anchelloti came, their playstyle changed a whole lot. If you just take out the latest loss vs Sheriff, they were a goal machine. Carlo knows that they don't have a good defense this season so he plays all-out attacking football. And I don't like the attitude of Ronald Koeman. He said earlier this season that FCB has a future because of him. Later he lost 2 or 3 matches. What I'm saying is, he should not be this much arrogant.
I feel that Koeman still looks arrogant with his attitude and character, and the reality now seems to be the opposite of what he said before.
but apart from that, I think the difficult team conditions and the declining performance will definitely make the mentality of the players also drop and it will be difficult to restore it.
maybe it is true with some people's opinion that Koeman should leave Barcelona is the right thing considering the current conditions if it continues like this it is not impossible that Barcelona will not achieve anything this season