Teenagers' nightmares are often a manifestation of trying to get rid of their parents and gain independence. I can regard this dream of yours as a nightmare. The terrible characters in teenagers' nightmares are often the embodiment of their parents. Think of your parents as terrible monsters and you can leave them. When weaning children, some mothers will put some peppers on their nipples to make them uncomfortable, so that children will eat instead of breastfeeding, which is beneficial to children. Children will be malnourished if they can't get rid of their attachment to milk. Similarly, teenagers should be weaned psychologically. They should stop depending on their parents for everything and be emotionally independent. So the dream "smears pepper powder" on the image of parents, which makes teenagers afraid of them and avoid them, which is also good for teenagers.
Legend has it that some monsters will eat their own children. If parents don't want their children to be independent, then they will be like that monster in a sense, thus becoming the monster in their dreams. In your dream, the death of your father and your indifference and strength mean that you have the desire to achieve self-independence, and your father hinders your dream. Relaxation is normal.