Yeah, this is a common fascist recruitment tactic. "The world has gone to shit, things were better before."

This is the call to return to the golden past, a perfect time before "they" took it away from "us." In reality, as you point out, that golden past never existed. However, once people have it framed in their minds that their chance at utopia was "taken" from them, there's almost nothing they don't feel justified in doing to take it back.

Modern life as we know it is relatively recent. Maybe 150 years MAX. Sure things have always had a tinge of bad, but take things in context.

We're in an age where our grandparents or great grandparents, people we had exposure to and spoke to, experienced the start of monumental technological advancement in a relatively short period of time. Cars, planes, phones, movies, photos. Consider how much of your life is centered around these advancements.

We live in an extremely different and short lived period of humanity, where people we end up putting in charge of important societal tasks speak as if things like the economy are laws of nature, despite existing in its current form for maybe 2-3 generations at most.

This poster is experiencing the culmination of these advancements. The alienation, the over stimulation, the speed at which life takes place. It's starting to show itself as a bit of a dead end as the ice caps melt away.