What I have been seeing for quite a few years now is that Barca is inferior to Real Sociedad in the Anoeta. You see one Barca all year, then you see a different team in the Barca uniforms in this stadium. Real Sociedad, too, when they play Barca at their home in Liga, they are superb, clearly the superior team.
Maybe the current Barca team will break this habit maybe the new players are not Donostia cursed the way the rest of the squad has been. This team has been looking like a team that will win out through the end of the season, that will score lots every game, concede around two goals per month.