In my opinion, the reason they lost the match to Barcelona is because Atletico received a red card; if not, I don't think Barcelona would have an easy time winning the match in that manner. It was their home game, and even though Barcelona isn't exactly playing so that well, I wasn't expecting them to lose. Although I was aware that Atletico was struggling in the league, I did not anticipate Barcelona to defeat them 3-0.
But the game's turning point came when Atletico was given a red card, which definitely gave Barcelona the advantage. I think the match would have been lot tighter and possibly finished differently if that setback hadn't occurred. Even with Atletico's recent league troubles, I didn't think Barcelona would win by a score of 3-0 that convincingly. It only goes to show how erratic the game of football can be, with even the smallest change in circumstances having a significant impact on the result of a game.
The defeat was totally not caused by the red card. Have you watched the match? The red card was given by the referee in minute 90+2'. All the goals of Barcelona was in minute 38, 47, and 65. The red card was nothing to do with those 3 goals. TBH, I wanted to see the surprise form Atletico Madrid because they were playing at home. But in the fact, Barcelona wasn't dominating the match but they won it, they finally got 3 points. I don't understand what's happening with Atletico Madrid.
After this lose, I don't know how Atletico Madrid will end the season. They are no longer in the UCL zone, they are in the 5th place. I don't expect to see Atletico Madrid fails to finish this season in the UCL zone. I hope they will play better for the next matches and collect enough points to return to the top 4 again.