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.

What murgatroid said. It's a behavioral-based psychological treatment, related to cognitive behavioral therapy, applied behavior analysis, etc. It's used to treat OCD or specific phobias (which I think they changed in the latest DSM but I'm old and out of school and that's not my field of practice and I'm gross with covid fever so no googling, sorry).

Basically you get exposed to things that cause you mild anxiety and slowly increase until you acclimatize to your biggest anxieties; in recent years research has shown pairing this with beta blockers can be highly effective and faster.

I'm a behaviorist who happens to have OCD. I did exposure therapy and I believe in its effectiveness... But I saw a TV show where an OCD therapist wanted her patient to touch a port-a-potty seat and lick her hand after. I don't know if the patient did it, bc it went against the medical ethics courses I took and I didn't watch the rest of the show. I can't believe a provider would think that's acceptable.