Paul Maloney is an anti-neoliberal author and the leading critic of talk therapy: namely cognitive behavioral therapy and it's children (DBT etc). He wrote a well reviewed book called, The Therapy Industry: The Irresistible Rise of the Talking Cure, and Why It Doesn't Work. He generally holds a philosophy that self-described incels also hold.
Paul Maloney abides by a social-materialist psychology, a psychology that sees social relations and the external world as the most important determinants of mental health.
Incels also believe that social relations (such as monogamy rates, arranged partnerships, feminism, etc) and the external world are more important determinants of mental health than inheritable behaviour patterns such as confidence (potentially).