The systematic "you're ugly/fat/old/you look like a man" insult towards women means one thing: I view women as sex objects, therefore telling a woman that she's unfuckable is the worst thing I can say to her.
This automatic insult can come from both men and women, and what they mean is: you have no reason to exist. It's like saying: "kill yourself". And they expect us to interpret it like that. They expect us to take it very seriously, very personally, to be devastated to hear that we're not attractive and therefore failing at being the only thing we're good for: a sex object.
So when someone immediately insults a woman's appearance in some way, you can automatically understand it to mean that they view women as sex objects and it has nothing to do with the woman's actual appearance.
