Storytellers rarely set out to write a bad romance. Usually, forced relationships are the result of external pressures, traditional tropes, or structural shortcuts.
Audiences are highly empathetic and socially aware. When two actors with zero chemistry are forced to share intense, passionate scenes or deliver cheesy dialogue, it creates palpable awkwardness for the viewer. 3. It Ruins Story Pacing
The best romantic storylines almost always stem from rock-solid platonic or rival dynamics. Before making characters fall in love, make them like each other, respect each other, or push each other to be better. If they cannot hold a fun, engaging conversation as friends, they will not work as lovers. Show, Don't Tell
Many writers feel every story requires a romantic subplot to appeal to a broader demographic.