Your chain of command should always be utilized first to resolve issues and problems in your unit. You also have the option of filing an IG complaint if the chain of command cannot resolve your issue.
You should go to the Trial Defense Service (TDS) on base who can advise you on how to fight this.
This post is for information purposes only and does not constitute legal advice, nor does it establish an attorney client relationship with Mr. Cassara.
A for good of the service separation may or may not be warranted. No one on AVVO has read the psychological packet, so what is there that is causing the concern is not known by any responding to you. You need to sit down with a JAG, with review of the packet, to determine if there is grounds. You have said that your CO wants to separate, but you did not say you were presented with any packet for separation. It was my experience that if separation is being contemplated, you will not be permitted to transfer - of course I was Navy and you appear to be Army. But I don't think the concern for separation and transfer would be different. Best wishes!