Barcelona often drop points against smaller teams. This season they have dropped points against Granada, Mallorca and Getafe. And all three teams are outside the top 10 of the points table. Granada and Mallorca have won just one match this season. Barcelona lost points against such weak teams.
Barcelona lost points when they played against Granada and Mallorca because Lewandowski was absent or didn't play as a starter. Meanwhile in the match against Getafe, they got difficulty to score because they played with 10 players only (Raphinha got a red card). It is quite unfortunate for Barcelona, these are small teams that should be easy to win. But they failed to get full points because of an unacceptable reason. They too depend on Lewandowski, their attackers performed under performance, and they do unnecessary mistake during the match.
Barcelona played well and won against big teams like Villarreal, Sevilla and Real Betis. I think we will see a good performance from Barcelona in the upcoming matches as well. Barcelona will play three consecutive matches against Athletic Club, Real Madrid and Real Sociedad. The opponents in all three matches are very tough. Even so, I expect Barcelona to pick up full points in all three matches.
When they played against big teams, they are more focused and prepared better. Xavi put their best players in the starting lineups. Barcelona players also struggle all out due to the prestige of the matches. But in the match against small teams, they may play ineffective. They seem a bit underestimate small teams, Xavi also sometimes rotate the starting lineups that make a change on Barcelona game.