Fundamentally a Hero's Journey reimagination of Frankenstein, Poor Things explores themes of the human condition, patriarchy, and ideology through its subversion of the overplayed 'born sexy yesterday' power fantasy trope of oversexualized, childlike women.
Unfortunately, I did find its understanding and criticism of power imbalances to be somewhat muddy and sometimes a less cynical repeat of Lars von Trier's work (e.g. Dogville or Breaking the Waves). It also centers a running theme of women's liberation and agency tied to their sexuality and their control of it, which deserves its own essay but, in my opinion, is not as nuanced as it pretends to be, nor as liberating necessarily. Instead, for me Poor Things's main strengths lies in the unreliable narrator sense of direction and cinematography taken to portray the protagonist's growing understanding of the world.