Is there any retro consoles that you never lived up to their potential? where the games fell short of the hardware?.
Personally I feel that the NDS was under-utilized, as it was a fully 3d capable console, that was used mostly for 2d pixel art games, and platformers. When it was able to support full 3d platformers and even a fan remake of portal.
This was actually a major gripe I had when playing Jersey Devil on my PS1, once I found out about emulators I created a custom controller config for it that made it much more playable though.