By that anology, you're implying the game is less popular than the previous titles?
If so, then how do you explain that FO3 and FO4 both have a Very Positive rating on Steam, but only 6,869 reviews for FO3, and a whopping 51,357 reviews for FO4?
From what I've seen, most of the complaints about the game regarding the main new settlement building and defending feature, are due to most people just not having a clue how to build and defend them.
Plus I do think it's true too that when forum activity is extremely high, especially on official forums, the bulk of it is complaints, not praise.