I think its interesting that in the "rationalist" latter half of the 20th century Freud began to be dismissed at least in part on account of his elective affinity with Lamarck; now, it is clear that certain environmental and social factors have an influence on offspring at the genomic level from both parents.
Freud was not a scientist, he was a great artist. It is not clear whether any of his patients got better after Freud's treatment.