Your dream reflects a complex interplay of themes, including anxiety, fear of the unknown, and the struggle for safety in uncertain environments. Here’s a breakdown of some key elements in your dream:

1. Corporate Building and Security Guards: The corporate setting may symbolize your current life situation, possibly reflecting stress related to work or authority. The concerned security guards could represent feelings of unease or anxiety about something you sense is off in your life.
2. Bathrooms and Avoidance: Bathrooms often symbolize a need for cleansing or a private space to process emotions. Your decision to avoid the guards by seeking refuge in the bathroom suggests a desire to escape from stress or conflict.
3. Hallway and Crowd: Being lined up with others can indicate feelings of pressure or conformity. This part of the dream might hint at societal expectations or obligations that you feel trapped by.
4. Pool and Fear of Swimming: The large, deep pool signifies emotional depth and perhaps overwhelming feelings. Not knowing how to swim suggests feelings of vulnerability or a lack of control in a situation where you feel surrounded by chaos.
5. Giant Grizzly Bears: These bears, being both large and sentient, represent powerful emotions or challenges that seem insurmountable. Their ability to talk indicates that these challenges may be rooted in communication or understanding, but their aggressive nature suggests a looming threat.
6. Empathy and Choice: Your interaction with the bear shows a willingness to understand and empathize with your fears, which could symbolize your attempts to confront and resolve internal conflicts. However, your realization that it’s a trap might point to feelings of betrayal or the fear of being misled by those you trust.
7. Abandoned Room and Apocalypse: Finding refuge in a broken room and recognizing the apocalypse signifies a retreat into isolation and the acknowledgment of deep-seated fears about failure or the end of something significant in your life.

Overall, this dream seems to suggest that you are grappling with significant stressors and fears in your waking life. It may be beneficial to reflect on areas where you feel overwhelmed and consider ways to confront these fears rather than retreating. Building a support system or seeking guidance could help you navigate these challenges more effectively.