There is absolutely no feeling of Post Apocalytpic Wastand in FNV as there was in Fallout 3. Fallout 3 had a great effect of it, but FNV absolutely had no feeling, felt like I was walking in a [censored] 1800s movie rather than Wasteland, even rage was more than a Wasteland. Such feelings are unacceptable!
Mostly because it's a state of Post-Post-Apoc in the West. As you can see by NV and before in FO 2 NCRs grown and been able to lay down new infratstructure and semblence of both normal civilian and political life.
With 3 a different studio than the ones who made NV whose parent company now owns Fallout, Bethesda Game Studios, placed D.C. as a hellhole as understandably it was bombarded the hardest(1 also had that feeling of bleakness but 3 topped it).
Difference is FO1,2, and New Vegas explains all these details and how everything comes about. Nothing in 3, from food source to how so much still stands in the face of the war, is explained.
It's not new, BGS likes to use vagueness as a strength, "let the player make their own theories."
But in reality it shifts work off from them.
If you'd like a feeling like 3 play the original Fallout or 3.
Plus NV is set in the west aiding to more of that "Rangers" feeling set by "Wasteland" or westerns(Releasing in the same year as Red Dead Redemption)
If you dislike progress, sorry. But Fallout doesn't do Apocalypse for the seek of thrills. It's not survival horror. S.T.A.L.K.E.R. is. Fallout does have dark humor but combines it with other themes, including survival.