I'd have to say WiiU because a large part of why the PlayStation 3 did bad initially was the pricetag, and that was down to the hardware costs associated with the new optical medium and processer, not really how they 'handled the launch'
Infact given the mass media hatred and pricetag, i think the PS3 did pretty darn well considering.
In contrast, Nintendo had it all in the bag, a install base of near on 100 million for the previous console, a decent launch price, higher spec hardware than is currently available, and the most loyal fanbase of any platform, with all that going for them they still managed to ram it all up their own backsides.