An action or behavior that undermines an individual's own interests or goals.

स्वयं को असफल बनाने वाला कार्य

English Usage: His self-defeating attitude prevented him from achieving success.

Hindi Usage: उसकी स्वयं को असफल बनाने वाली मानसिकता ने उसे सफलता प्राप्त करने से रोका।