It's very simple. If people don't want to date you, you will be single. Women have the right to reject men and basically every proposed solution besides "make men more desirable" to fix the "problem" of undesirable men being single is advocating for women's autonomy being stripped.

Men being single isn't going to kill them. They don't need to be in a relationship to be happy. If anything, the problem that needs to be solved is the push for them to be in relationships.