Meaning, they have a habit of projecting their insecurities and outrage on the rest of the world, weaponizing their own unhappiness and turning it into an activist movement.  If they are miserable, other people are not allowed to feel content; that would be unfair.  

It is for this reason that modern feminism is often accused of being an ideological cult for narcissists.  Everything about it seems to be designed to elevate and appeal to the worst kinds of people.  Not only that, but the belief system is now so pervasive in western countries, especially among the college educated, that 60% of women say they identify and agree with the "common definition" of feminism, even though the common definition does not match the behavior and motives of most feminists.  

This percentage changes, of course, depending on the specific tenets related to feminism, but in most polls at least 30% of women in most western countries embrace the majority of third-wave feminist concepts.