Bluhbluh, if I understand your question correctly, you seem to think the passuk you quoted (which is actually Koheles, 7:10) indicates that we are wrong to think that the “olden days” were better, thus contradicting the Yeridas Hadoros theme of this thread.
I think you misunderstood the passuk.
There are a few ways to translate it, and none contradict the concept of yeridas hadoros. According to Rashi, “Don’t wonder or be surprised at the good reward that the Tzaddikim of earlier generations got, such as dor hamidbar and the doros of Yehoshua and David Hamelech, because everything comes according to the zchus of each generation.” (Please look at the Rashi yourself as my translation is not accurate.)
As for the OP’s question, which I understood as: Was the yeridas hadoros greater in our generation than in previous generations?
I think the answer might be: Yes.
The generation that lived through the Holocaust went through tremendous nisyonos. Those who were in the USA at that time also went through great nisyonos, as shmiras Shabbos was not a simple thing here in the early part of the 20th century. The members of that generation who managed to remain frum, to keep Shabbos and to send their children to Yeshivos were truly remarkable people. Many were actively involved in building Yeshivos and Bais Yaakovs in a spiritual wasteland that did not seem to be fertile ground for such an undertaking.
The post_Holocaust generations (I think we’re just getting started on the third so can we say there are two that have reached the maturity needed to be part of this discussion?) have different nisyonos: They must deal with nisayon of “osher” or wealth as opposed to the suffering of those who raised them (even a poor person today lives with luxuries that were unknown a couple of generations ago), and the great nisyonos that come from living in an immoral society coupled with advances in technology that makes the immorality almost unavoidable.
It would seem to me that our generation is not dealing with its nisyonos as heroically and successfully as those who preceded us, and it looks like we’ve fallen an extra few steps back in addition to the natural step back each generation takes.
I’m open to hear from anyone who disagrees!