I would just like some place where I would be "hypnotised" enough so I can just vomit out horrible emotions and "images" and then not even remember having felt them and having vomited them out.

This is what I was responding to. To my knowledge this isn’t a thing. Therapy doesn’t remove unpleasant feelings or bad memories or disturbing thoughts and images. It can lessen their hold on you. For sure the therapist should not judge you for your “emotion vomit” and to the best of their ability create an environment that feels safe for you to have and express your ideas, memories and feelings.

But is it completely safe? No. You’re going to feel raw and awful if you’re talking about awful things. If you’re accustomed to being judged you will likely feel (or worry) that the therapist is judging you even if they aren’t. And you’ll need to talk about that and it’ll take courageous vulnerability to do that.

Vulnerability is not making yourself weak, it’s allowing someone to know you. That can feel scary. And you can decide whether and with whom you’d like to do it. But if you avoid it forever it can manifest in unpleasant ways like panic attacks in public or whatever.

Therapy is messy and can be unpredictable. I think that’s a feature, not a bug.