It wasn't entirely Lewandowski's fault, but if you look at the attacking lines of the last 15 years, then they are now not even close in quality to what they were used to at Barcelona. I understand the frustration when they are still longing for two strikers like Suarez and Messi, The attacking line Barcelona now has is much weaker. But it is not only the attacking line, it is the midfield and the defense that are both not as strong anymore.
Real Madrid made a lot of right decisions. Barcelona has some great talents, but they don't have players that are so decisive like Vinicius Junior or Bellingham. I also think that Real Madrid's defensive players are stronger in aggregate than Barcelona's defensive players.
We have to think realistically in this case because indeed we cannot compare Barcelona today with Barcelona in their golden era because however their strikers in the past like Zlatan, David Villa and even Etoo they were supported by very qualified playmakers like Messi and Barcelona's two irreplaceable midfielders Xavi and Iniesta so that no matter how bad their strikers are then they are like when trying new players like Bojan or Giovani Dos Santos at that time then they can still win very worthy because their midfield and play makers are strong but for now it will be very difficult to do.
Firstly, Lewa's age is almost at the end of his life for a professional player and there is bound to be a decline in performance due to age and injuries. In addition, the other supporting factors in midfield are also not going well because in the end if you look at before when Gavi and Pedri were not on the field they could not do anything because only De Jong and Gundogan were not enough to make their ball rotation stable.