I agree,
@JayCS , life has been challenging ever since there has been life on this planet. Life is challenging for every sentient being everywhere and in all times. Ad of course our various conditions do not stem entirely from modern life, or at least probably not, and as you say there's no way to prove either way.
We don't even have a concept of how hard it was to be a human being in, say, 1524. In many ways it was a lot harder than it is now. In other ways, it probably was not. I think one difference is that in previous centuries there were not the toxins in the environment that exist now (although there certainly were unchecked diseases!).
And of course, people's problems in times past were far more personal. You had fear or anxiety because you or your way of making a living, or someone you cared about or your community, was in some way threatened. These days there is still that, but on top of that we also know what is happening in the rest of the world, to people thousands of miles away, and that has an effect on us as well.
Knowing that as things are going now the human species is very likely to bring about its own extinction, or very near extinction, before more centuries have passed, along with that of many other species on the planet is stressful for most people. Surveys have shown that there are more people who identify as depressed in the US than ever before, and therapists are at a loss for how to help people with climate dysphoria, which is rapidly growing into a serious problem, considering that they cannot use traditional methods to treat it.
I wouldn't want to time travel to live in another time if such a thing were possible. This is a fascinating time to be here, and I am pretty sure my life is easier than it would have been in many if not most other times and places. But it is also an awful time to be here, with a bleak future for many species on this beautiful planet. The thing that gives me the most comfort is that I feel certain that after the human species is gone, this lovely planet will regenerate and there will be many more wonderful species that evolve in time.