There is no way to say that Barcelona played badly against Inter Milan in the Champions League match. Barcelona performed well in both matches and were able to dominate to some extent. However, Inter Milan was lucky. They were able to secure the victory until the end. Barcelona lost due to the poor performance of Barcelona's defense and goalkeeper.
Barcelona will want to win both the Champions League and La Liga titles next season. However, it is now more difficult for Barcelona. Because Real Madrid is trying to strengthen their squad. Dominating La Liga will not be easy for Barcelona this season. Also, the Champions League is always fiercely competitive.
Last year, Real Madrid had a very bad defensive zone, but this year they closed this gap with very good transfers. We had already seen that the offensive zone was very good. Also, the technical director has changed, they continue on their way with a technical director who gives opportunities to young people and has good tactics. Their match with Real Madrid next year will be more exciting and competitive. I don't think they will have as easy a season as this year.
Last season we saw Real Madrid's weak defense because several of their players were injured. Otherwise, Madrid's defense was very strong last season too. Madrid had talented and experienced defenders like Carvajal, Militao, David Alaba Rudiger and Mendy in their squad. Then due to injuries, Ancelotti was forced to play Tchouameni in the defense position.
However, Madrid does not want to take any risks this season. So the team has strengthened their defense further by adding Hujisen and Arnold to the squad. The new coach Xabi Alonso has already proven his talent. Now we are waiting to see if Alonso can succeed with Real Madrid. Alonso has got a perfect squad. He will also get enough support from the Madrid management to strengthen the squad. Even then, if Madrid's performance is weak, it will be considered a failure of Alonso.