In the late '90s, there were so many horrible jerseys, it is hard just to pick one. Teams like Buffalo, Pittsburgh, Washington, Vancouver, LA, Calgary, and the NY Islanders all had perfectly good uniforms in the '80s and early '90s. Yet they all wanted to fix something that wasn't broken. Buffalo, for instance, went from a great logo and color scheme (blue and yellow trim) to the worst possible color scheme (black with red and grey trim) and changed that great logo.
Not to mention teams new teams in the '90s that came out with horrible jerseys like Phoenix, Colorado, and Atlanta. Unfortunately, Colorado still has that same horrible color scheme and Arizona brought back those horrible jerseys from the '90s as their third jersey.
Thank God that ALL these teams I have listed have either gone back to their original logo and color scheme (Pittsburgh, NY Islanders) or something close that is actually an improvement on the original (Buffalo, Washington, Calgary)