No rom-com, drama, or vampire saga is complete without an old-fashioned love triangle. Even though viewers have different priorities when it comes to shipping couples, there’s always this one cringe-worthy love triangle that everyone dreads as long as it goes on. Sometimes, the trope-y back and forth of the main character between two potential partners dilutes the intensity of the characters’ personalities as well as the plot. Some on-screen couples and their “third wheels” are so toxic that the juggle between them over multiple seasons or sequels is off-putting.
Source：https://www.cbr.com/tv-movie-love-triangles-make-no-sense/
