It's bad by recent standards, but worst in gaming history? Any year for the GameCube after 2003 and any year for the Wii U after 2014 come to mind. Heck, most years for the PS2 would probably count, seeing how Sony had basically every developer out there (aside from Nintendo, Microsoft, and their second-party studios) developing for the system, so there was no need for them to publish anything of their own.