"From the outside looking in, Jung's orientation appeared too mystical and religious, since he used these sources collective symbolism. This may have touched upon an atheist taboo." posted by pioneer in the comments section
I went off looking for Freud's refusal to travel out of town because one of his wealthy patents might get well in his absence quote and found this interesting page.
here is another example:
"Satanists, for example, teach that happiness comes from liberation of repressed desires - sexually repressed desires particularly. I assume they were doing so long, long, before Fraud graced us with his "thesis". 'Ophiolite posted this comment
Oh and the affair with his sister in law was mentioned as well.