It was mainly on Sega's leadership, but I would say the PlayStation. The Dreamcast couldn't even kill off the aging PlayStation and the PlayStation 2 killed the Dreamcast. The Dreamcast was discontinued only about a year after the PS2 launched in Japan, and about half a year or so after its launch in other major markets.
The Dreamcast had so much going for it, but bad blood between Sega and consumers and the sheer titan that was PlayStation killed the Dreamcast before the GameCube and Xbox even launched.
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 57 million (was 60 million, then 67 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima
