1: The system was incompatible with 2600 games.
2: there was a whole shitload of Re- release titles.
3: they have a software library that failed to hit triple digits.
4: They created the most hated controller of all time.
The controller: Sure it has a pause button and a 360* joystick, but it didn't recenter properly and it was so fragile that it will break after just a few hours of play.