Madrid was only concerned of their attacking force, they forgot that only strikers cannot win the matches for them. Only Mbappe and Endrick was signed into the club after thet won the Champions League last season. This should be a lesson for Madrid management that they need to solidify all areas of the team if they want to continue winning trophies like they did in the past.
Real Madrid is now aware about their problem and started to fix it. They successfully sign a young potential CB from PL club, and more to come. I absolutely agree about they being so careless with their defensive line this season, but seems try to fix it as a part of preparation for the upcoming season.
A new CB already secured, more CB and wing back to come soon. Just wait and see.