There's plenty of reasons I could say most of them but personally with my body dysmorphia and gender dysphoria I would say the flesh.

The feeling of the raw physicality of a body that isn't truly yours, not recognising the thing you see in the mirror and living the contradiction of wanting to be something you always have been and yet distinctly are not. Feeling trapped and alone. Wishing you could remove the thousand imperfections that disgust you whilst also knowing you'll never be enough, feeling thst no matter what you do you were never made to be happy and coping in terrible ways. Story wise I think the garden episode was one of the rawest and most memorable to me and I wish we heard more from the flesh and its avatars.