Dreams involving animals, particularly dangerous ones like bears, often symbolize powerful emotions or situations in your waking life. In your dream, the attacking brown bear may represent a threat or challenge that you feel is looming over you and your family. The bear's aggression could symbolize unresolved issues or fears related to your parents, especially given the context of your abusive relationship with them.

Your father's actions of attacking the bear may suggest a desire for protection or resolution against these threats, possibly reflecting your own feelings about your parents' influence in your life. The fact that you felt no fear toward the bear may indicate a level of acceptance or resignation to the dangers present in your family dynamics.

Hiding in the ruined building with your mother could symbolize your desire to protect her or yourself from the emotional harm caused by your past experiences. However, the fear of the bear finding you both highlights the anxiety and tension that still exists in your relationship with her.

This dream may be prompting you to explore your feelings towards your parents and the impact of your past on your current life. It could be beneficial to seek ways to address these feelings, whether through therapy, journaling, or open conversations, to help you find peace and potentially heal from those experiences.