Arrow | - Season 4

They killed (Katie Cassidy).

Killing the Black Canary—a character who is Oliver’s soulmate in the comics—to further the "Olicity" angst was a narrative betrayal. It wasn't heroic; it was cynical. Worse, her death felt like an afterthought, a plot device to make Felicity sad rather than a meaningful end for a character who had fought her way back from alcoholism and despair. Grade: C-

When it worked, it was sweet. When it didn't, it derailed the entire narrative. Season 4 is infamous for turning the Team Arrow headquarters into a melodramatic love nest. The lowest point? Felicity literally walking out on Oliver after a major life-changing secret... while she was in a wheelchair. It was a moment so tone-deaf and emotionally manipulative that it broke a huge segment of the fanbase.