OF wore Supreme and and got some commercial success, so now everyone associates supreme with being some super hipster BS. Supreme has been making quality shit and not giving a fuck for years and years before anyone on NS cared.
Supreme is a streetwear brand. It's fashion / high fashion sentiments brought down to a street level. Other examples include Stussy, The Hundreds, HUF, Blvck Scvle, Crooks, 10deep, freshjive, Bape, the list goes on.