...
... Everything looks worse in El Crap. Everything. And they know it. It's intentional. The freaking OS promotes eye strain. Im now getting eye strain playing with it. Never happened with Snow Leopard. I'm ok with flat icons, but the choice of color palette and brilliant white windows and the illegiblity of all the grey text and file names is a disaster. It looks so much worse than system 7 circa 1995. Wow.
(Yes I've set "increase contrast" in settings).
...
System legibility is also tied into the display that is used. And, with the advent of the retina displays, the system is really headed toward making that high density screen pixels as the norm for the use of the system.
(I'm guessing that you have not spent any time using any retina Mac
)
just my 2 cents: the Increase Contrast setting is really designed as part of the visual compensation for vision-challenged folks.
If you changed that setting, then that would make some parts of your GUI "over-sharp". As you can see, that sort of "adjustment" to the system means that there are a lot of compromises at play.
I hope you did
not move the "Display Contrast" control to the right, away from "Normal". If you did, setting that back to the left might even show you that it has been affecting the rest of your GUI, too. Just a little too far to the right can fuzz everything out.
I find it hard to compare anything in macOS to the old classic Mac OS (worked as a Mac tech at that time), and there's a huge difference with macOS providing full-time font smoothing and other font display technologies that just didn't work well at that time. (I guess you might say it still doesn't work, at least to your satisfaction)
So, I don't agree with much of your assessment, although there are areas I would really like to see - like the option to go to some kind of darker GUI. There's some progress, with a dark dock and menubar, but those bright white windows annoy me at times, too. There are a small number of apps that give you a dark interface, but then when you leave that app, the system jumps right back at you.
And, Sierra beta has added the night shift feature, which is quite impressive (turning it off for a moment is an unpleasant experience late at night
)
I expect that whatever is coming in the next release for mac OS, you may see your dark interface, or some iteration going closer to that.