5. "Love Is A Battlefield" (season 6, episode 11)
The fact that an episode like this could exist so close to Crisis On Infinite Earths boggles the mind. "Love Is A Battlefield" is a Valentine's Day-themed episode that sounded like it was going to focus on Barry and Iris West-Allen. Instead, it placed the spotlight on a gang war between two feuding lovers (who also just so happened to be two of the corniest villains the show has ever seen).
Yes, it turned out that Amunet Black and Goldface (whose real name is Keith, by the way) were in a relationship until it all turned sour, and it's up to Barry and Iris to save Central City from the havoc they could cause and... get them back together? Yeah, well, needless to say that fans did not respond well to this one.
Amunet Black is a lot, but she works under the right circumstances and can be quite a fun addition to the show. Goldface, on the other hand, got corny after his decent first appearance, so the decision to pair these two over-the-top characters together made "Love Is A Battlefield" a tough one to get through. And that's before we even discuss the infamous "Daddy likes the metal" scene.
This episode wasn't great, but it would have been forgivable if it came somewhere else in the season. Coming off the back of Crisis On Infinite Earths, which produced some of the show's best ever storytelling and left it without an endgame, was understandably just too much for some viewers.