Technically I can't give a professional opinion over the internet, but given a hypothetical situation presented as you've described above, my knee-jerk reaction would be that for whatever reason, the practitioner planned and executed the treatment incorrectly. The planning aspect in particular is closely tied to the same theories and techniques I learned in graduate applied behavior analysis courses; laypeople commonly hold misconceptions about the jargon of my field but a psychologist should definitely be familiar with the concepts and their application.

I'm sorry you had such a poor experience. I'm terminally ill, immunocompromised, and currently ill with my third acute bout of covid (plus long covid since the 2nd bout) so I intend to return and answer here more but for now rest.