This smells like social media feminism. The kind of thing that a few people will tweet about voluminously for a while, and news/culture publications will write articles about for clicks, but which has little to no existence in the real world.
Not having sex with you is not equal to hating you. Hating men that hate women is not heating men in general.
In my opinion feminism has two school's. Old school feminism where they fought for equal rights, basically women's rights are human rights. And new school feminism which is basically misandry, or wanting to have more rights than men. This includes women who wants rights more than men, but justify it using moral budgeting.
I didn't hear about 4B before 6th of November, so I hope this is will be a new kind of feminism that is similar to old school feminism!