Put out an ad:
"I am starting a Dungeons & Dragons Campaign in an unforgiving world where democracy is unknown, petty tyrants are more common than wise officials, slaves raid the coast, and the dark forests and threatening caves are full of barely-intelligent creatures who were created by dark gods for the sole purpose of causing mayhem. Do not write your character a long backstory, because your deeds and the dice tell the story. Many a notable historical figure has ended his story with, 'and he died to a chance arrow,' and your character may very well meet a similarly ignominous end. Monstrous races will not be allowed, as monsters are created evils in this setting."
The woke are allergic to campaigns where orcs aren't heckin' wholesome, evil is real, and your character isn't a special snowflake. This sort of campaign absolutely filters the worst of them.