Just after the game finished many Real Madrid fans started attacking Barcelona because of their playing style they said Barcelona was defending during the game all the time and they didn't deserve victory at all because Real Madrid was controlling the game more than Barcelona and unlike other El Clasico we usually saw real Madrid had more successful passes comparing to Barcelona while the most important thing is the result this game is which Barcelona could bear Real Madrid even without players like Lewandowski and Perdi.
Regardless of whether you deserve to win or not, I think it depends on how you evaluate it, because in essence they still won, but when you look at the match, it's a fact that Barcelona played a little boring and this style is like Atletico always plays. But there's nothing wrong with playing it safe because of course this is Xavi's strategy.
Barcelona isn't a boring pattern playing team, it was only the kind of game plan suitable for that match seeing that Barcelona players are on injury.
Controlling the game and securing a win is two different thing. Real Madrid were on an open attack leaving a vulnerable defense for Barcelona to lunch attack. It would have been more than a goal if Barcelona made use of their attacking line as usual, but I'm glad they were able to win the match.