For me personally, as a nintendo fan, it felt worst in 2011 after the 3DS came out and the Wii U had been announced. Add to that the fact the Wii had become a tiresome console in the sense that once people got over the motion control craze the Wii's sales dramatically slowed down around this time.
I think 2011 was the first time neither Nintendo's next gen home or handheld consoles appealed to me and I was really worried at the time that both were doomed to fail - the 3DS eventually managed to turn it around with an epic library so fair play but the Wii U was never able to do that.
These feelings were felt by Nintendos shareholders as well because around half way through 2011 the share price dropped and reached its lowest value in recent years in summer 2012:
