Ruger P-89. I never owned one but worked at a shooting range through college and man were those things junk! Someone at Ruger should have been fired, rehired, made to respond to each and every piece of hate mail they received and promptly fired again.

Also had a BPS 10 gauge. Liked the gun well enough but feared the detachment of a retina at every trigger pull. I sold it to a guy who in turn sold it for the same fear.