How would you compare girls in the 1970's and the 1980's to girls nowadays?

Unladylike. 70s and 80s girls in general were scrubbers. 

50 years older ?

Women, and, people in general; are a lot more saavy to the point of being cynical.  Vietnam, Watergate, Rodney King,   9/11, Trump and others  caused many to lose faith in our govt, president, police,  society, and news media. Rapes and  attacks  that hit spotlight have eroded women's trust of blind dates.

Girls/women then were not as high-maintenance and arrogant as nowadays. And they knew what they wanted. This nonsensical talk like you can have it all, is rather confusing since it does not correspond with reality. Nobody can have it all. Everything comes in a package with advantages AND disadvantages.

I would say girls today are a lot smarter.

Girls in the 1970s and 1980s were hot and classy! No tattoos or piercings either... yet they still stood out as unique and awesome for the men. They took pride in their appearance, their reputation, respect for themselves and for others.They actually had clothes on, and looked very nice indeed, looking sexy and desirable.

They were better back then verses the ones now.

girls back then had morals, knew how to behave and treat people, had self respect, nowadays many young women are ghetto degenerates.

in what countries? In (western) Europe  women nowadays  are not that pleasant very often. In the past I suspect they were nicer.

Women still have the same needs , human nature can't have changed,  but I think they self sabotage  more nowadays and more are unhappy as a result.

Also because they tend to play more the same roles as men who deal with them more on a daily basis , men probably don't have the same fascination with them that they did before either.

Women are on average alittle heavier