Though the "Soy disrupts hormone levels and causes feminization!" 
broscience shit is obviously a myth, as an androgynous vegan who is really loving the effects of estrogen (that I definitely got from 
and not little blue pills, by the way) and has this like "my gender is really whatever you wanna make of it, if it even is to exist" dynamic going on in terms of how I identify, soyboy just kinda hits, y'know?
Obviously, reclamation only goes so far, especially for a pejorative neologism that is a bit more memey and weak, so it's something that I wouldn't throw out as a serious label when sharing a detailed description of my gender identity, but the term is a vibe for me in a way that's larger than it just being a goofy meme that I play around with a bit whenever I hear chuds throw it at me or even anybody else.