I think the world will be what you think it is for you, if you like the material advances many have made in the recent past then you will think it is advancement, but if you focus on the ignorance of most people then you will see that everything is falling apart. In fact we really don't see the entire picture of what might be the real truth. One thing however is clear, we will always discriminate and we will always have a sweet spot in our hearts for our own views, which can sometimes help or hurt our quest for the truth.
I agree completely with what you say. There was great good and great stupidity then, as is now. All part of the same kali yuga. i do wish you wouldn't make absolute statements about what some saints or mystics did or did not believe. You have no source of knowledge on that one.
I think it's pretty safe to say that Christian mystics in general would not have thought in these terms because within that system there is no equivalent of kali yuga. In the Christian view, this is the messianic age - the age in which Christ has come. The next big significant event, so they say, will be the second coming, and the apocalypse. I'm not really stating an absolute view, but I don't know of any medieval Christian writings that speak of this as a dark age - of course, my knowledge is limited, and there may be something somewhere.
Was there ever a time when things didn't appear to be falling apart? In effect, that's the question here where the topic is yugas. If one believes in a golden age in the past, then this might seem worse. But - was there ever such a golden age? I've already said that myself, I doubt it. I don't see how a belief in the possibility of human progress and evolution can harm a sincere quest for truth. Seeking for truth is a matter of being open to different points of view, different conceptions of things, and flexibility is needed. This post began with Chief Cowpie's post on Sri Yukteswars ideas on kali yuga. I say that this only goes to show that to rigidly adhere to the view that this is a dark age may not always be useful.