Actually you are right, the squad is atrocious. A 35 year old goalscorer in terminal decline. The backup is Ansu Fati who last season scored 10 goals in 51 games. The only of those 10 goals that had any impact on the match came against Mallorca when the league was already won. Third option is 16 year old Yamal who in typical Barcelona media hype fashion is already a future Balon d'or candidate. Rafinha I don't even count, he is just another over hyped Brazilian.
Players like Oriol Romeu, Andreas Christensen, Ferran Torres and Sergi Roberto arn't even good enough to fill out the squad for the training sessions, they have no business wearing the Barcelona shirt.
If Ter Stegen is injured we have 3rd division bench warmer Peña and untested Astralaga to throw in because we lost our best reserve keeper to PSG. In fact the bench is without a doubt the weakest I have seen since 1994-95 season. Even in the 2002-03 season when we finished 6th by dumb luck, we had a much stronger bench.