So do I write about how good it was before it got so bad
Actually, this would be helpful in a certain format.
Can you make a list of tangible things - actions - that have been present in the relationship as positives, and a list of actions that caused confusion (negatives), and a list of specific issues that you have questions on.
I think you've done the latter two already, but it would likely be good to put them altogether.
How do I get some of my power back in this situation?
I don't think it's so much about power as it is about stability. Re-forming a therapeutic alliance doesn't just happen because it needs to; it's a process. In many ways, you are starting over. Which means you do have an equal stake in this. What will be hard is really understanding how to re-address the gaps that are being left as a result of these new boundaries.
Like, not written back since Sunday might be the new reality; the question is, "what is your new time-frame for responding about scheduling; or, is there a way we can make it easier?" You also need to brainstorm what the 'other' support options are. Will he be able to speak with the specialist, or does he now believe it's a bad idea? You're looking for an update.
These are reasonable things - but they also take some time to be answered and implemented. It's a new relationship - that's probably the most useful thing to keep in mind.
(Another way of thinking about the positives is, what would you like to keep, and what do you need more guidance on in terms of how to handle what's going away. Is there anything going away that you are sad to lose?)
Yes, I definitely feel like I am being threatened.
I can understand why. Do you think it's possible you aren't being threatened, but rather, are having a catastrophized reaction to a new boundary?
I can tell you that I also understand where the supervisor is coming from - if you are making demands that exceed the scope of these new interpersonal boundary lines, then it would be inappropriate to mislead you into thinking those demands would be met.
On the other hand, if you can speak in terms of the things worth saving, and the gaps that need addressing - it will shift the locus of pressure away from your therapists shoulders and place it instead in the space between the two of you - which helps it become a clearer problem to solve.
I hate that this sounds like 'don't get what you need' - because that's not what I mean. It sucks that this is all happening. But it is to the good, right?
That's a fair question too though. Is it still worth it? Making the lists might help figure that out.
And don't underestimate the sheer amount of re-building, from zero, that goes into making the therapeutic alliance work again in a situation like yours. It's effort that both you and your therapist will need to make. (I think that's why she's pointing out that he's human - she's just making the point poorly)
Sorry. Super ramble-y. My brains a little mushy, hope there's something useful in there for you.