User blog comment:H1V3M1ND 3V0LV3D/What is the worst game that had Street Fighter involved?/@comment-158.174.97.127-20190409155237

"(could not find a link)" Here are links to the arcade version and the home console version.

On-topic, while I don't really consider it to be the worst, SVC Chaos needs a "honorable" mention. It was quite the mess imo, both as a SNK fighting game and a SF-involved fighting game.