Well the first 2 things that come to mind are making it too easy to pirate games and timing it to where the N64 and PS already owned the current market and soon after the PS2 was assumed better just from when it was released. I think there were some games that launched with PS2 that had prior DC ports that actually looked superior on DC but people assumed newer system was better so shittier ports sold better on the PS2. But also a lot of the games really weren't that fun, at least to me. I mean when I play Sonic I want constant magic like the originals on the Genesis, not some horseshit exploration.