It's not Post War Shady Sands it says Shady Sands library and a massive hole created from a nuke.
This definitely isn't a basis for it, completely baseless unless we're assuming they're retconning all of Shady Sands.
My guess is the writers either forgot or didn't care that Shady Sands was newly built and retconed it to be located near pre-war ruins. Bethesda has retconed all sorts of things before so it wouldn't be out of character. And yes I know they aren't making it directly but they are still heavily involved.
The Bone Yard is a massive remains of Pre-War LA.
The NCR took over the Boneyard as a state in 2189, show takes place in 2296. It's 107 years it sounds like a lot but IRL LA (Which would be in theory much less denser than 2077's LA) took decades to grow to a major city and this was with substantial resources from the United States, it's realistic that there would still be huge swaths of territory in the Bone Yard that hasn't been dismantled and salvaged.
They'd be basically starting over from scratch as a Nation.
While the NCR would not be able settle every bit of the area they should still be able to project power in the area surrounding one of their largest cities because that is what functional governments do. I could well believe that there are areas further from settlements that still have dangerous wildlife or places that have a crime problem. But that's not what we see. It is simply not possible to have a large strategic city nearby without any sign of real civilization. And yet we do.
Or they could be the Mid Western Branch or the East Coast returning
We don't know the context but they're using T-60 power armor so it's possible, the only ones with Blimps we know of are the East Coast and potentially Mid-West Brotherhood, T-60 was also more common in the East.
They are obviously from the East Coast Brotherhood. The flag they fly is the Eastern BoS flag from Fallout 3. But that doesn't change the fact that the NCR wouldn't permit them to run around in their territory if they were a functional state.
That doesn't indicate the NCR currency became useless, you do know in Vegas some NCR Troopers are paid in caps right?
Having a preference for which currency you accept in a random ass store is like saying credit cards in the US have no value because a store only accepts cash. It's a ridiculous stretch
New Vegas is a frontier that for the most part isn't legally part of the NCR. This is supposed to be in the NCR's core territory. It's ridiculous for anyone there not to accept their own nation's currency. It would be like some random ass store in the USA refusing US dollars because they only accept Euros.
A lot of Fallout has hostile wilde life, literal tutorial of New Vegas has Fire Geko horde attacking you.
Yes, and that is on the frontier where these sorts of dangers have not yet been pushed out. While there should some remote areas that have these sorts of things, the inhabited parts of it should not much for the same reason we don't see random mountain lions and bears wandering through DC or NYC. Because civilized communities don't permit that shit.
Not that it really matters. The advertising for the show has been pushing it as a savage wasteland experience. In an area that's mostly civilized. This means that either they have chosen to only advertise parts of the show that take place in wild areas, which would be a very strange marketing decision, or that civilization is mostly gone.
Totally not being biased or subjective
I am not talking about whether it is aesthetically pleasing or not. What I mean is that the only settlement we see is a decrepit shantytown overrun by bandits. All they show are ruins, shacks, and wasteland. Again, I can easily believe that some parts of the NCR are like this. But not all of it or even most of it.
The whole point of trailers and promotional materials is to give an idea of what to expect from a product. If that is all they show is ruin and squalor than that is probably featured heavily if not exclusively in their show.
A two second clip isn't enough to make that determination tbh. They could have been deserters or poor quality troops, not enough context to the scene.
They are obviously not deserters since they are waving the NCR flag and fighting the Brotherhood. And I have a hard time believing that they would have such poor quality troops in their core territories, especially near the Boneyard where they make most of their weapons and armor.
Ooorr oooor she's traveling through the ruins of the old world, remember the NCR hadn't completely rebuilt the entire world they build a chain of cities from scratch the old shit is still there.
Then why is that all they show? And why would the protagonist bother at all? The NCR hasn't rebuilt everything but they have looted anything worthwhile. I guess she could looking for something specific and be bouncing between isolated pre-war ruins to find it but it seems like a stretch.
But anyway the protagonist is shown freaking out about how dangerous things are outside of the vault and a point is repeatedly made of how harsh the world is. If there was still was a functional network of cities than it wouldn't be nearly as bad, if only because you could get fresh supplies and medical treatment between excursions.
I think most of it relies on assumption and personal bias. The only valid I point I feel is the NCR equipment which looks too messed up and dirty implying their home territory army is in a state of disarray.
I can only make guesses based on what Amazon has released so far. And thus far they have shown plenty of shots of desolation and lawlessness and none of functional civilization.
If the NCR is still intact and if civilization still functions on the west coast then why has Amazon chosen to market this show in the way they have?