Interpreting the ending

I’ve seen a few people who are dissatisfied with the ending, saying that Ellen suffered against Orlok the entire film, only to “give up” and “lose” at the end. I felt like Ellen’s ending was perfect, though:

From what I understood, Orlok is thematically a manifestation of Ellen’s repressed nature (inner darkness, sexuality, etc), and for the length of the film she battles with her shame regarding her nature. I feel as though her sacrifice to Orlok at the climax was more of a confrontation with her nature, accepting it rather than fleeing from it, and ultimately giving herself and those around her peace from it.

I’m curious how others felt about/interpreted the ending! What are your thoughts?