"Your argument seems to be that modern time dehumanizes us"

Well, yes, my argument goes a bit in that direction.
(but I had to look up who Luddite was - and no, I am not in line with him, but I do like Kafka)

Anyway, you do not have to convince me, that technology is incredibly useful in making our lives much more easy.
I know that.
And I do not want to miss it.

And I certainly do not glorify medieval times. So I would agree, that for the average person, live back then and there was probably much worse, than it is today for the average person.

But I am not so sure about comparing to a primitive hunting-tribe.
Live was (is) tough for them, for sure.
But it was not all-the-time war with neighbours. Most of the time it was peace. Things were simple, although hard.
The need to find and hold good hunting grounds. Care for the own tribe. Watch out for predators and potential enemies. Supply for the winter.
And as far as I know, they did not had at all the disease problem, you described: mostly because there were just not so many people-connections for a big plague. And they did not live inside their own shit, like the people in the medieval cities without sewerage. They lived in clean homes, washed themself every day in the river and ate good food (mostly).
People also got sick, sure. And when they were not strong enough(or too hungry), they died. And were not kept alive only to send more bills until the final fading out.

And humankind lived in that manner for most of its time. Civilisation and living in cities are quite new. So I would argue, that our genes are still more adopt to that primitive livestyle and therefore you would be more happy to live that way.

But again, I do not want to go back to that.
It would also be impossible, without wiping out most of mankind.

And have you read 1984? One main topic was that the newspapers there reported and proved daily, how the lifestandard again has improved over the past. Only that it certainly didn't, but nobody could prove otherwise.
And your stating, that we live now in the most happy world of all times, reminded me of that (also, that I learned that literally in school).
But we have no way of knowing - so even the poor peasants from a feudal farm might have all in all been happier than the average low wage or unemployed looser from today.

Even though the guy from today is much richer and healthier from a materialistic point of view. But materialistic things are only a base and no guarantee for happiness.

And lastly - I simply feel much more alive and happy, if I am in wild nature.
Not so much, if I am in loud, stinking and hectic city. I can only stand the latter if I block out parts of my senses, desensibilize - one could also say, if I kill parts of myself.
And I think, this is exactly what many, if not most people do today. They still move around and do and buy things - but on the inside they are pretty dead. Even though the medical report would classify them as stable and healthy.

And there is less and less nature and more and more (polluted) cities.

So that's why I am sceptical of your original argument ...

But otherwise I pretty much agree with you, also why you made your arguments as there are indeed many people who romantice the past and have not yet lived even for one day without hot water from the tap.

Well, I did (for quite some more time) and I know it is fun, as long as the sun shines and you have enough supplies.

Otherwise, in more practical terms, I suppose we want pretty similar things for the future.
Better, sustainable technology, which does not leave a wasteland behind nor pollute everything.

So for example, if all the cities would have only electric cars and the power comes mostly from solarplants located in the dessert (or a clean fusion plant) ... well, that would be a huge step forward, in my opinion.