Clearly she struck a nerve with you. While you felt she was insulting you, I guarantee that was not her intent. Her words were sharing her observation that life seems to weigh you down. She acknowledges you are only 24 and wants/hopes for you to feel more free (for you) in your life. She wants for you to experience your life in a way that doesn't feel overshadowed. She wants good things for you. She thinks you deserve to feel happier, more enjoyment, ease, lightheartedness, etc. She meant well. Her hope was she could point out the heaviness she observes and doing so would help to free you from it. She meant well.
Regardless, time to move on. No need to be an azzhole in doing so. This is an experience you will never forget. Move on in a way that will make you proud when you'll think back on it, in 10, 20, 30 years.
