Baroque. It was only $30, but it was a confusing, frustrating mess beyond all messes I'd played before. Played it for a few hours, trying to figure out what the hell was going on, then promptly turned it in to Gamestop. Haven't looked back since.
SSX Blur. A long time ago, I had SSX Tricky for the Gamecube, and was completely addicted to it, even though it made me rage out of all control. SSX Blur was... well, it was horse shit. Why? The control was the exact opposite of intuitive, and even when I started to get it down, it was STILL hard as balls to play right. The whole point of games like the SSX series is the ability to control the character perfectly to: A, maneuver around obstacles and B, be able to pull off stunts and stunt combos. Neither were possible.