Hussar
Legend
Tell that to my children who get called "half" on a daily basis by complete strangers. When people I meet tell me to my face that I have "half" children.That simply isn’t true
And, as @Remathilis very rightly points out, the base description for the "half" races in D&D has always been outsiders and outcasts. From Tanis "Half-elven" all the way throughout D&D. 5e flat out leans into it:
5e PHB said:Walking in two worlds but truly belonging to neither, half-elves combine what some say are the best qualities of their elf and human parents: human curiosity, inventiveness, and ambition tempered by the refined senses, love of nature, and artistic tastes of the elves. Some half-elves live among humans, set apart by their emotional and physical differences, watching friends and loved ones age while time barely touches them. Others live with the elves, growing restless as they reach adulthood in the timeless elven realms, while their peers continue to live as children. Many half-elves, unable to fit into either society, choose lives of solitary wandering or join with other misfits and outcasts in the adventuring life.
Oh, goody, being a half means that I never belong to a culture. I'm set apart. I get to join other misfits. Note, dwarven adventurers aren't characterized as "misfits".
5e PHB said:Dwarves who take up the adventuring life might be motivated by a desire for treasure—for its own sake, for a specific purpose, or even out of an altruistic desire to help others. Other dwarves are driven by the command or inspiration of a deity, a direct calling or simply a desire to bring glory to one of the dwarf gods. Clan and ancestry are also important motivators. A dwarf might seek to restore a clan’s lost honor, avenge an ancient wrong the clan suffered, or earn a new place within the clan after having been exiled. Or a dwarf might search for the axe wielded by a mighty ancestor, lost on the field of battle centuries ago.
Even halflings, the prototypical unlikely hero, don't characterize adventurers as "misfits".
PHB said:Halflings usually set out on the adventurer’s path to defend their communities, support their friends, or explore a wide and wonder-filled world. For them, adventuring is less a career than an opportunity or sometimes a necessity.
It's only the half races that are misfits.