Let's be real, Barcelona doesn't have a second chance at UCL. They will do their best against Bayern Munich, but this alone will not be enough. They will wait for Viktoria Plzen to perform a miracle and beat Inter. The odds of beating Bayern Munich are also low in my opinion. It is impossible for Viktoria Plzen to beat Inter. Therefore, it would be better for them to start thinking about UEL instead of UCL.
Barcelona are in a tight corner that it will be difficult for them to remain in UCL. The mistake Barcelona made was not taking the UCL games serious, I don't know how they want to perform a magic to win the remain game left for them to qualify.
I wait to see Barcelona to try as best to win their march.
2 wins hoping for Inter to play badly is indeed something quite difficult but this can still happen even though the chances are very small.
Maybe in this case only luck can bring Barcelona back to the next round because this is like trying to escape from the eye of a needle.
Inter's opponent is one that is advantageous for Inter. If Barcelona lose or draw and Inter win then it's over for Barcelona.