If you ask how this match was lost, even Mourinho himself said he could not understand it. Real Madrid dominated throughout the game; shots, possession, and dangerous attacks — which area did they not overwhelm their opponents in? But that is football. Sometimes, no matter how much you analyze, there is no explanation for why the ball simply will not go into the net.

At the press conference, Mourinho's tone showed clear frustration. He said that if the match had only ended in a draw, everyone could have accepted it, but that goal disappeared, replaced by a Betis counterattack. Sometimes fate is simply unreasonable.
Arda Guler's substitution became a hot topic on social media after the match. Many felt the Turkish youngster had controlled the midfield brilliantly and that taking him off made little sense. But Mourinho defended his player, saying Guler's performance that night was outstanding and that the substitution was purely a tactical decision.
Looking closely at the match, Guler's dribbling and creativity were indeed impressive. His central runs broke through Betis' defense several times, and his through balls created many threats for Benzema and others. Being substituted at that moment would leave anyone feeling a little disappointed.
However, Mourinho also said that several adjustments in the second half were mainly to avoid an accumulation of yellow cards and were not because he was unhappy with the players' performances. However people interpret it, the coach has more information, while spectators can only watch and discuss.
The refereeing topic could not be avoided. The name Hernandez Hernandez may sound a little complicated to pronounce, but his decisions that night did cause plenty of controversy. Was there a penalty? Why was the goal ruled invalid? Mourinho said he did not clearly see the entire process at the time and therefore did not want to make a casual judgment.
The comment sounded restrained, but many people knew he likely had his own view. As a coach, he chose to leave room in his words. Perhaps he might change his opinion after watching the footage the next day, but at that press conference, he did not intend to blame the referee.
This kind of attitude is not particularly common in today's football. Many managers who lose matches can hardly wait to criticize referees, while Mourinho at least maintained a degree of composure on the surface. The frustration and helplessness inside him were already written clearly on his face.
Near the end of the press conference, Mourinho said something very realistic: the team played extremely well today and deserved victory, but football is not calculated that way. Deserving it does not mean getting three points, and that is the harshest part of competitive sport.
Looking back, Real Madrid's defeat was indeed unfortunate. They took control from the opening minutes, while Betis spent most of the time defending deeply, and a comeback would have seemed like a miracle. The miracle did not happen; instead, Real Madrid wasted several excellent chances, which was the most frustrating part.
After Mourinho returned to Real Madrid, expectations from the outside world had remained extremely high. After all, this is his former club, and he created many memorable achievements at the Bernabeu. Failing to win his first home match, even with just a defeat, was a significant blow for him.
But at the same time, one defeat does not explain everything. Real Madrid's quality remains clear, and the season is still long. If the team maintains this level of performance, results will eventually come. Mourinho may simply need time for the players to understand his tactical ideas.
On this night at the Cartuja, Mourinho left with regret, but his expression seemed to say: next time, I will show you something different. Real Madrid fans can probably only comfort themselves in that way for now.