I don't think the things you listed have anything to do with it.

I think the level of communication is greater and that a chunk of men handling being turned down poorly has always been around. The fact that there are men who do handle it will leads me to think the issue is rooted in their upbringing.

If people want a safer society for women ( and better lives for men ) those factors should identified, communicated, and help made available for parents who want to bring their kids up right.