Fallout's success is on Jonathan Nolan, not Amazon.

Maybe it's because I'm not a Fallout fan, but I didn't like that one either. I didn't finish it, to be fair, but I watched the first 3-4 episodes and I found it nonsensical for the most part.

From people and animals healing within seconds of them injecting some sort of Jesus juice, to armor suits protecting against explosions and extreme fall damage but not angry bears, or people living for centuries in the surface but from the looks of it the apocalypse happened just two days earlier, with no one bothering to clean up their own house a bit. In one scene you see soldiers wearing thick metal armor flying around on helicopters, in the next scene there's people using bottle caps as a barter resource.

And that's just about the verisimilitude of the setting and the events. The writing felt very amateurish/childish for the most part. Again, I have no reference to the source material, but from an outside perspective, I wasn't impressed.

The visuals are very good (not ground-breaking by any means, but they do their job well), but that's the extent of the praise I'd give to that series.