3DS is a handheld with a Region Code. A Region Code. But without a charger - not even a charging cable was supplied in EU. Fuck that.
Plus, the non-new models were underpowered for what they asked for. Still a neat piece of kit, but just not worth the asking price. And that completely killed off any momentum until Nintendo decided to sacrifice WiiU to rescue 3DS, which doomed that system to an undeserved end. Thankfully, the hard brake strategy managed to let the 3DS live a decent life. DS obviously shits on it from a great height due to better value, region free, humongous library (DS+GBA > 3DS+DS) and better battery life, but that was a Wii level phenomenon. The new series at least theoretically added some value, but if I ever find out who designed the nub I'm gonna twist his thumbs off and jam them in their ... ahem.
WiiU completely failed on all fronts, especially at launch with the horrible GUI lag, the questionable software release cycles and frankly, due to being the successor to the Wii without getting the corresponding amount of support. It never had a chance, really. Nice enough idea that keeps the price for the system too high, plus Nintendo never really got to show off its gimmicks (remember that TV guide thing?). Still kinda meh with the lacking battery life of the controller, the missing multitouch and the inability to serve more than one full Gamepad. Shaky VC support was annoying. Overall, kinda okay, but not overwhelming library of solid should-play titles. Not a loss to own one, but also not a loss to not own one. A resounding Meh.
Amazing to see Nintendo completely fail to capitalise on both DS and Wii successes.