wrongheaded

adj

Etymology: From wrong + headed.

1. Having an obstinately (persistently, stubbornly) perverse/erroneous opinion or judgement.

   “He's not just wrong, but wrongheaded, about raising the kids.”

   “Reputation—a mere barren reputation, that brings nothing with it, save a post obit bond on posterity—has lost its ancient value: and the panters after posthumous reputation are now closely confined to a few wrongheaded enthusiasts, […]”