Fallout 1 and 2 were master pieces precisely because they let you write your own story more or less.
You could finish Fallout 1 without killing anybody, or massacre any young kids with a sadistic touch. You could go directly to the end game zone using stealth, or fast run to a ghoul infested city to save them for annihilation with the right timing. And when you succeeded in what you believed was your final mission, you were betrayed by your own family and discovered that's where the game really started! Hell, you could win the game by enrolling in the end boss team or convince him to suicide!
Bethesda's fallout is nothing like that, it's a vanilla yogurt. Fallout 3 is a disgrace of hidden linearity where children are immortal and the world is mostly static. Characters are Manichean and simplistic. The conclusion of the scenario falls so flat it's not even on the C major scale.
Writing a good Fallout is not following the game story, which is very vague, but rather embracing the twisted spirit, ludicrous humour and weird lore of the universe. If they go full "the boyz" + "z nation", amazon could pull it off. Not so much if they go "ring of power" + "the walking dead".
You cannot write a good fallout story with good vs bad characters.