
The greatest danger of poor psychotherapy is not its waste of time and money but rather that the process becomes distrusted by the patient. Conducting psychotherapy may be one of the most complex of jobs since it involves interaction between the conscious and unconscious minds of two people, this causing inevitable errors. The antidote for this is self-awareness by the therapist, their good training, and honesty. But no therapy is perfect, an eminent British psychoanalyst, Michael Balint, wrote long ago in a paper posthumously published by his wife, that having been treated by the most eminent British analysts he gained a little understanding of his life from each.
If a therapist is excessively narcissistic and the patient feels inadequate they may become tied to their therapist, unable to leave and gain more competent treatment. This is the greatest danger of inadequate treatment: that the patient henceforth avoids it, no longer trusting the process because of their earlier destructive experience.