Honestly, I don't think Real Madrid can beat Barcelona because, objectively, Barcelona is stronger now, and the match against Atletico showed that Real Madrid's defense still has many weaknesses. And before El Clasico, Real Madrid still has a match against Villarreal, who are currently the third team in La Liga with 16 points. I think that, despite this being a home game for Real Madrid, beating such an opponent will be a challenge. So, I think Barcelona's advantage can only increase in the coming rounds.
I preciously agreed with that Real Madrid will never be beat Barcelona because they don't have a good strength, like their tussling capacity is lower than Barca due to poor defensive tactics. So indeed Real Madrid have no more sustain to give teh defeat to team like Barca.... This season Real Madrid never face any strong challenge, like they didn't play against the toughest opponent. Played the same match against tougher opponent and lost that too with a nasty big margin.
Barcelona is a very strong team in all perspectives. So I don't think Real Madrid will be able to beat Barcelona. All teg time only one team has been dominant in the El Clasico which is Barcelona.
Since Kroos' retirement and Luka Modric's departure, Real Madrid has become more youth-oriented. Vinicius Junior and Rudiger's off-form has been a major problem for Madrid in big matches.But if Mbappe adjusts well to the Madrid team, Vinicius returns to form and, especially, with the coaching of Xabi Alonso, Real Madrid could soon be a formidable opponent against Barcelona.