I can tell you exactly why men don't do the traditional things to try and court women or be polite that they used to, but you're possibly not going to like the reason.

"Mainstream media likes to glorify males who tend to mistreat women and yet pass on the chivalric ones that don't make headlines."

I would disagree with you that the media glorifies males who treat women like crap, I think it's far worse than that and they actually make it out that men like that are the norm. Not only that, the ones who forget worshipping women and putting them on a pedestal, just treat them nicely are all grouped together as being some kind of manipulative menace that's purely out to score sex with them.

I do wonder, have you ever actually asked a guy about this? I'm single, never had a girlfriend and I can tell you now that in my country in the UK at least I would actually consider it dangerous to try and hit on girls nowadays. To quote Dave Chapelle, chivalry is dead and women killed it, much of what women are dealing with on the dating scene seems to actually be self-inflicted because they refuse to trust men or are terrified of them because of what they've been taught about men when they were young.

Unfortunately, feminism has been responsible for this, a rising wave of utterly misandrist crazies who control the universities, various 'equality' groups, political lobbying and so on and they seem to have the specific goal of making women completely terrified of men and blame the invisible 'patriarchy' for all their problems.

The reason I bring this up is because even though you're talking about chivalry being a good thing ( Which Is a thing I don't mind by the way ) you seem to be using an awful lot of feminist style buzzwords in this piece which makes me wonder how much you really know about the political group.