While it does appear that the perspective you're talking about has been repeated over and over, it's important to recognise that it's a perspective which applies to whatever time in which it was held. Therefore, it's relative. Maybe the past _was_ amazing and wonderful, and perhaps _that_ past's past was even _more_ amazing and wonderful. It's possible things _are_ getting worse and worse all the time, only society has failed to heed the "warning" of the doomsayers, leading even greater decline in "wonderfulness".