I only have a BA degree in psychology, but I can tell you it's a very subjective science that changes every year in many ways with New disorders, or changing diagnostic criteria for this or that disorder, etc.
I will say this, whoever this lady is, no matter what her reviews are, she sounds absolutely heartless.
I wouldn't trust a word she says, in fact it's good you want to cancel any future appointments and look for a completely different therapist.
narcissists are notorious for having good reputations with many they have fooled, but when they're around someone who is vulnerable, they often turn abusive and enjoy feeling sick 'power' by being a bully. I don't know that she's a narcissist, but she certainly doesn't sound like someone that would care about her patients.
Even if she was attempting so called 'tough' therapy technique, she's actually breaking ethics and possibly even a law depending on the area. Regardless, the last thing you need on top of serious problems is to pay someone to be cruel.
If it were me, I would leave a voicemail or email indicating that she's not the right fit and you were seeking counseling elsewhere, and to cancel all appointments. I would avoid interacting with her over the phone or in person.
It sounds like all she's going to do is just add more damage and confusion to someone who is already suffering.
She Shouldn't be allowed to be a counselor, you might even consider reporting her to the licensing board. Don't let her intimidate you, she's just a person and frankly she sounds like a heartless b*tch. Reviews don't matter, what matters is what you believe is right for your loved one and is she even helping your loved one?
My vote is you're better off without someone like her, and defeats the whole point of counseling for her to be so disrespectful. In my opinion, it comes down to this: is your loved one being treated with dignity? If not, I wouldn't trust any treatment connected to such a cruel person. I would take away her involvement immediately.
Your loved one deserves better than that.
No matter what his condition is, everyone should be treated decently.