Very few occasions a dream can be literally translated.

My father wasn’t a bad person either however I symbolising killed him because he was very controlling of my mother, and I am the older sibling so I was kind of support for my mum since my dad was also controlling with me.

You are only killing this part of him you don’t like and you probably was present when your parents had an argument before the divorce.

You seem being overcoming old wounds but the unconsciousness is still there to tell us that it will take a time to heal them completely.