Oh, I don't have a problem with men wearing pink. All men in my country, including my own father, regularly wear pink: it's considered perfectly masculine here.
But a pink armour? That's too much, it was ridiculous even on Wonder Girl (yeah, I know it was supposed to be bronze, but it looked pink to me).
And while Saints are often referred to by their constellation, in Shun's case it was really a matter of "straw that broke the camel's back": you already look, sound, pose, act and dress like a stereotypical girl, and then you name yourself Andromeda too?