This doesn’t compute. It’s easy to see a dark age coming, and plenty in foundation did, which is why Seldon was able to get the encyclopediasts project going. What makes a foundation is estimating the dark age length and taking on the challenge of radically shortening it.
Plenty who saw it coming. In the foundation series for eg there’s a populist demagogue like trump, and various other profiteering types who show up in the final stages on Cleon I in Prelude to Foundation/Forward the Foundation