There is a fundamental issue with the quote "Equality always feels like a loss to people who are previously unfairly ahead" when you assume that those who are opposed to "equality" are doing so because they fit this category.
Sometimes, they are upset because they are being forcefully dragged back when they were getting ahead by their own merits. Many pro-equality/equity people operate under the assumption that inequality is the result of someone rigging things. Some people are just inferior.
@shortstories That could be part of it. I do theorize that many women are operating as they are due to society coddling them, and that they would change their behavior with proper consequences.
Though as for math, many women often just hate it. Think how often you have heard "I hate math." Is it usually a man, or a woman saying this?