This season Real Madrid always loses to Barcelona. This team has met at least 3 times. Twice in La Liga and once in the Spanish Super Cup final. And yes, in these three matches, Real Madrid always lost. First, Real Madrid lost with a score of 1-2, then Real Madrid lost with a score of 0-4, and finally Real Madrid lost to Barcelona with a score of 2-5. And actually I'm not sure that in the Copa del Rey final we will see Real Madrid avenge their previous defeats. because from the previous match against Real Sociedad we still saw how fragile Real Madrid's defense was. So Barcelona's chances of winning still seem quite big in El Clasico this time.
Your statistics are wrong and that's because Real Madrid have played against Barcelona in just two fixtures this season, one in the Spanish La Liga and the other in the Spanish Super Cup final which the Catalonian club won both games. Barcelona beating Real Madrid in the previous two games both clubs have played this season shouldn't make you think Real Madrid can't beat them again this season.
Despite losing in their last two games against Barcelona, I'll still be betting on a Real Madrid win when both face each other in the Copa Del Rey final. Carlo Ancelotti is one manager that knows how to win in the most important games which is why I'm very confident that they'll be winning again Barcelona
I think this El Clasico will end in a draw. Both teams have already faced each other twice this season and know each other’s tactics well. This time, they’ll play more cautiously, avoiding unnecessary risks. Real Madrid will be eager for revenge, but Barcelona won’t back down either. So, we’re likely in for a hard-fought battle where neither side will want to give an inch.