I don't feel safe

This all seems so cruel. I find it hard to understand why proper trauma-informed therapists would essentially treat SH like a "bad behavior". It is a coping mechanism. It is there because it serves a purpose. With compassion and detached observation it could become understood and thus properly addressed.
I am sorry your therapists are abandoning you to your own devices. I would think there is a better way.

I know that it seems like your treatment providers wont help you anymore. believe me it felt the same way with me when a therapist told me that I had to take responsibility for stopping my and my alters self injury. but then a really good therapist explained something to me....

by my own words to my therapist the self injury was getting worse with therapy, not better...

what if I had a special kind of allergy and hives and the treatment was taking allergy meds. but no matter what allergy meds were prescribed, the hives get worse.. would the doctor tell me to keep taking allergy meds... of course not, they would say since allergy meds make me worse they cant give me anything for the hives. that it was up to me to take cool baths and not scratch.

my past therapist explained to me mental health treatment is the same way...

if working on trauma issues is making a person worse not better the treatment plan is changed so that there is no more talking about trauma issues.

if working on self injury problems is making a person self injure more treatment plans are changed so that there is no more working on self injury problems.

mental health treatment focuses on getting better. there are even laws and ethics that say treatment providers must help a person not harm them by making them self injure more.

for some reason my self injuring was getting worse even though I was in therapy. since therapy for self injuring was making things worse the therapist legally and ethically had to back off and not focus on my self injury. they had to wait until I was more stable and able to work on it with out self injuring more and worse.

for some reason your self injury is getting worse not better. so the treatment providers have no choice but to stop working on it, just like when a medication makes someone worse they stop that medication.

maybe someday when you are more stable and able to work on your self injury with out treatment making things worse your therapist will be able to legally and ethically help you on this again.

maybe you can keep track of when and how you self injure and figure out why, while in treatment your self injury gets worse not better. this may give you an idea of what needs to be done to stabilize you so that while in therapy you dont get worse, and instead get better.

I am sorry that you are not getting better care, and that the system seems to prevent you from getting different care.

Can Viktor write? Or draw? I found that having the self destructive parts draw or write when not triggered, just to explain their views of things and why/when they act helped my system to calm down and be less triggery. Inviting them to express themselves seems to let off some steam.