Your dream is rich with symbolism and suggests several themes related to self-identity, conflict, and the search for understanding. Here’s a breakdown of the key elements and their potential meanings:

1. The Snowy Woods and the Bird: The snowy woods might represent a place of isolation or introspection, where you are confronted with something unsettling, represented by the strange bird. The bird’s awkward appearance and vulnerability could symbolize feelings of inadequacy or concerns about how you or others are perceived. It may indicate a sense of being out of place or struggling with your own developmental stages.
2. Argument with Your Aunt's Boyfriend: The disagreement with the boyfriend could reflect a conflict in your waking life. This might be a struggle over differing perspectives or the need to assert your intelligence and opinions. His dismissive attitude towards you may represent external pressures or judgments you feel from others, particularly in familial or social relationships.
3. Comparison with His Daughter: The comparison to his daughter could indicate feelings of competition or insecurity. It might reflect your worries about being measured against others' successes or a desire to prove your worth and capabilities.
4. The Poem and Transformation: The transition to your aunt morphing into Shelley Duvall and her boyfriend into Jack Nicholson may symbolize a shift in your perception of authority figures or family dynamics. The poem you imagined reflects your inner thoughts on individuality and personal boundaries, suggesting a deep desire for authenticity and respect for one’s identity.
5. Interpretation of Literature: Your aunt’s comment about the importance of teaching interpretation rather than just the text itself indicates a longing for deeper understanding in your life. It may suggest that you value personal interpretation and meaning over conformity, resonating with your struggle for self-identity amidst external pressures.

Overall, this dream seems to reflect your internal conflicts regarding self-worth, the need for validation, and the importance of maintaining your identity in the face of external expectations. It encourages you to embrace your unique perspective and advocate for yourself while also recognizing the value of understanding and interpreting the world around you.

Consider reflecting on your current relationships and how they may influence your self-esteem. Engaging in creative expression, like writing or poetry, could also be beneficial as a way to explore and affirm your identity.