That's just your own bias speaking. No, the fundamental human experience is the same as it has always been.
I'm not sure that we are referring to the same thing here.
The fundamental human experience according to my understanding is that we are born, eat, sleep and eventually die.
But in my opinion it would not be correct to sum up the collective sum of human experiences by referring to the fundamental human experience alone.
The collective human experience we have includes our experience of the development of such things as sciences, art and philosophy among other things.
It includes our knowledge of ourselves which i believe is much greater today than in Jesus's time due to developments in the fields of psychology, neuroscience etc.
As to whether or not secularism and progressivism are better worldviews than Christianity we'll have to wait another thousand years to determine that. There's no reason to assume that liberal ideas will maintain their currency even a hundred years from now.
Even if they don't maintain their currency a hundred years from now i believe it has been a better time under the liberal/progressive reign where a person may choose to openly express their opinions without being fed to the lions and a better time for minorities than it was under the Roman empire.
And the only reason I can see for liberal ideas declining is either due to violent disruption of civilised society due to the overbreeding of the religious or due to the breakdown of mechanised Labor which frees us from the grip of slavery when the fossil fuel runs out if we haven't turned to alternative energy sources.
As far as the violent disruption of society due to over breeding goes I believe that would be a major sin (against humanity) on behalf of religion for that to occur.
As far as the breakdown of mechanised labor goes it looks to me unlikely as we have nuclear and renewable sources of energy to fall back on.
In my opinion.