I think it is fair to say that there was a bit of naïveté with regard to Romantic poets as they saw the spread of industrialization and how it literally changed the landscape of society. In their view, though, the idea of an “earthly hell” (as you’ve said) manifested itself more readily in encroaching industrialization and its accompanying materialism, than in the “savage purity” of striving to be in tune with nature.
Both are incorrect, when taken in the extreme.