I don’t think you can call such a world good or perfect, but I don’t think it’s all bad either. I quess you could call it neutral.
I mean, I don’t see that world as a big failure, if a failure at all. No civilization will be there forever*, but the one I mentioned had at least achieved something at it’s time: it had once been glorious. While it left it’s statues, it still managed to keep the world habitable for life and other species. (note how I mentioned trees and plants growing on the ruins). To put it simple, it was a beatiful civilization that left a beatiful world.. It isn’t fair to call it a failure only because it wasn’t eternal.
*Who am I to say that?
I don’t know, or maybe I don’t understand your point. I would find a quiet and silent, post-human world very beatiful in a way. A world where the only reminders of the great, yet long gone civilisation would be ancient ruins.. Super structures which once were the statues of human prosperity and glory, now standing along with nothing but trees and plants, forever forgotten. Simply sleeping in a never ending serenity and silence...
Don’t you too, find such a future very beatiful in an eerie way? Even if there is no sentient being to perceive it at that time, the fact that such a future may exist one day, and that it can now be perceived through art and imagination, is where it’s beauty truly lies.