Barcelona has been struggling in recent weeks, with their defense being the main reason for their poor performance. In two consecutive matches, they have conceded three goals each time, which is a worrying trend that needs to be addressed.

The first match was against Real Betis, where Barcelona allowed them to score twice despite having a solid defensive line. The second match was against Atlético Madrid, and it was even worse as they were outplayed by their opponents. The team seems to be lacking in terms of discipline and organization on the field.

One of the reasons for the poor performance is the lack of consistency in their defensive strategy. They seem to rely too much on individual players' efforts rather than a collective approach. This can lead to mistakes and errors that result in conceding goals.

Another factor contributing to their struggles is the injuries to key defenders such as Jordi Alba and Gerard Piqué. These injuries have left the team vulnerable and exposed in their defense.

To address these issues, the team should focus on improving their defensive tactics and strategies. They need to work on building a cohesive defense that can withstand pressure from opposing teams. Additionally, they should also look into training more on how to defend as a team, instead of relying solely on individual efforts.

In conclusion, Barcelona's defense is struggling to keep up with their opponents. They need to make some adjustments to their defensive strategy and work on improving their collective effort. With the right approach, they can improve their performances and return to their winning ways.