It's not impossible for Barcelona to win the UCL. But if you talk about UCL for Barcelona, I think it's out of context. Because Barcelona has fallen from the UCL.
It is possible that Barcelona can win LaLiga and the Copa del Rey, both of which are still ongoing. Barcelona is also a strong club, but this season has been unlucky in the UCL. You can say it like that, if Barcelona has never won the UCL.
Agree with this, because regardless of anything for now talking about them with the Champions League is clearly not very useful because they have been eliminated long ago and this possibility will probably be discussed again later after this season is over.
Regarding La Liga, they are actually very comfortable and are just waiting to see whether Leg 2 in the Copa del Rey will meet their expectations or not.