It's understandable to feel distressed by the recurring themes in your dreams, especially when they involve violence and self-defense. Dreams often serve as a reflection of our subconscious thoughts, emotions, and experiences.

1. Victim to Aggressor Transition: Your journey from being a victim to becoming the aggressor in your dreams might indicate a shift in your personal feelings of power and control. This can stem from unresolved emotions or experiences where you felt powerless in your waking life. It's essential to explore those feelings—what situations make you feel vulnerable or threatened?
2. Self-Defense Themes: The recurring theme of self-defense suggests a strong instinct to protect yourself, which can be a natural response to feeling threatened or overwhelmed in your life. Consider what aspects of your life currently make you feel defensive or anxious. Identifying these triggers may help you understand the source of these dreams.
3. Repetitive Dreams: The idea that your dreams replay until a different decision is made can signify a need for closure or resolution in your waking life. You might be grappling with decisions or feelings that require acknowledgment. Reflect on any unresolved issues that may need addressing.
4. The Comfort of Violence: Feeling comfortable with harming others in your dreams could indicate a coping mechanism for managing your fears or frustrations. This could also signify a need to confront aggressive feelings safely, rather than acting upon them in real life.
5. Recurring Settings and Characters: The familiar settings and characters suggest a deep-seated narrative in your subconscious. These elements may represent aspects of yourself or your life experiences. Consider journaling about these characters or settings to uncover their meanings.
6. Seeking Help: While your friend's suggestion to see a witch may not feel right for you, it’s essential to seek support in a way that resonates with you. Speaking to a therapist or counselor who specializes in dreams or trauma might provide valuable insights and coping strategies. They can help you explore these themes and work toward healthier dream patterns.

To promote better sleep, you might want to establish a calming bedtime routine, practice relaxation techniques, and create a safe and comfortable sleep environment. Remember, dreams can be a pathway to understanding ourselves better, and addressing the underlying emotions can help reduce the intensity of these dream experiences.