Shenzhen remains in the bottom of CSL rankings due to its low CSL rating.

The Chinese professional football league, or CSL, is one of the most competitive leagues in the world. However, Shenzhen has been struggling to maintain a high level of performance in the league for several years now.

One reason for Shenzhen's poor performance is their low CSL rating. The CSL rating is based on various factors such as team performance, injuries, and transfers. In the case of Shenzhen, they have struggled with injuries to key players and have not been able to replace them with quality replacements.

Another factor that has contributed to Shenzhen's struggles is their lack of investment in the club. They have been criticized for not investing enough money into their squad, which has resulted in a lack of depth and consistency in their performances.

In addition to these issues, Shenzhen also faces competition from other teams in the league. Many of the top teams in the league have invested heavily in their squads and have been able to consistently perform at a high level.

Overall, Shenzhen's struggles in the CSL can be attributed to a combination of factors. While they may be facing challenges in terms of injuries and lack of investment, they will need to improve their performance if they hope to compete at a higher level in the future.