The current condition of Barcelona is not just due to some mistakes being done this season but Barcelona was decaying from the inside for years. They were doing more politics recently and being Més que un club they forgot how to make a good football club.
Not just the barcagate, Barcelona made controversies on release of both Messi and Neymar mostly because they were struggling to finance the team as they had accumulated huge debt. They would have performed better if they had spent money on players than bribing the referees.
Barcelona performance decline and it's quite obvious, why would an elite team like Barca fight to accumulate points when there mates, Real Madrid are winning matches without stress. Xavi Hernandez have even decided to leave the club at the end of the season because he's seeing no progress at Camp Nou. Barcelona originates from the team's board, they've failed to make good impression and I've watch and observed the team from a distance, they're suffering to fit into the system and there's definitely no good extent to see them back to triumph path in football.
In fact, at this moment Real Madrid also experienced a little difficulty in winning the match because after all, in the two matches against mediocre teams, Real Madrid actually needed greater effort to win. But yes, even though Real Madrid's situation is not completely good, at least the Real Madrid squad still managed to play with better effort because they have a good winning mentality. At least that is the difference between Real Madrid and Barcelona at this moment, the point is that Barcelona does not have a good winning mentality and becaause of that, it is difficult for Barcelona to overcome the problems that occur. Regarding financial problems, clearly, that is Barcelona's main problem and this problem cannot be resolved easily and quickly.