It's not either / or - belief in being brilliant/feeling of social inadequacy. It's classic grandiosity. They go together hand in glove. Pretty much all adolescents have it to some extent - for some people it's more extreme, and that make them more vulnerable to an ideological leader who will show them The Way.
I think it's true but it works more in terms of "I'm brilliant and can OPTIMISE it even higher" than inadequacy.
It's not either / or - belief in being brilliant/feeling of social inadequacy. It's classic grandiosity. They go together hand in glove. Pretty much all adolescents have it to some extent - for some people it's more extreme, and that make them more vulnerable to an ideological leader who will show them The Way.