The issue of the females saying, "There are no good men left," is a result of their being a fat pig (the growing number of them, anyway, in the US) or because of their increased expectations, sure.
Females are attracted to a combination of resources, attractiveness, and social standing, in general. While today, women can obtain their own resources (and I'm by no means saying that's a bad thing, except it is for many men, that's well enough so women can have the choice to work or not), that devalues males.
Females no longer *need* the male's resources in many cases, which leaves only two real base options: attractiveness and social standing. This weeds many, many men out of their weight class and means they must dive down deeper into the 3s and 4s and 2s if they're a 5 out of 10.
For instance, a recent study or statistics thingy showed that women voted 80% of men as below average attractiveness. In other words, a woman with a 5 out of 10 attractiveness scale views another 5 male as a 3. So, she'll set her sights on an 7 or an 8.
This also means that women have an inflated sense of self worth. And, they're already given social worth simply because they have a vagina, while men must prove they have worth through actions.
Just think of rape or murder cases. If it's a male, even I find myself caring less than if it was a female. Everyone gets up in arms and torches flaring
I have no emotional stake in these concepts. I just call 'em like I see 'em. And obviously there are exceptions--probably many. But, I think these are the base biological drives. I'm not saying if this is a bad thing or a good thing completely, but I can't help but feel sorry for the lower valued men out there. Women have it as good as it gets, beyond equality, in my opinion. In some/most/I don't know how many things, at least. At least, where dating is concerned, women have the playing field--the pick of any prime piece of meat. Or, a much better pick than men have.