And witcher and rings of power and GOT are absolutely bombing.

Fallout (the show) is popular because it’s good. Fallout (the show) is good because it religiously follows the tone of the original source. The original source was good.

That’s the point. Fanboys exist for an IP because it was good in the first place. More accurate = more good, because the original was good. It’s not just meaningless partisanship or fanboyism. You already have a good story. Just tell that story. Vary on that theme.