CC you are obviously closest to him. Are you talking to each other meaningfully or, is he reclusive? Does he go out alone and if so, can you ask where? If you think he might be angry with you for calling support services, is it possible for you locate a former member of his Unit or a friend that he might be able to relate to, and who is doing okay with civilian life or might be experiencing PTSD but doing better? It might be a way to reach the part of him that is beginning to regress. Maybe he will steady up if he can talk to this person.
I agree with the other members, this behaviour does not appear to be rational, and your instincts are telling you what is happening and with each change in his behaviour, appears to be an escalation. I think you and the other members are absolutely spot on. So,the time to act is now I think.
Try not to be too worried if he is angry with you for finding support for him, because not doing so, may have disastrous results for him, you and possibly the community.
Should he get angry with you, you can plainly explain why you are worried and bring up the subject with what else might comfort him, besides what he is doing. So, maybe him being angry with you and, if you can, reassure him you are there to help and that is why you have done what you have done, may help to settle his anger. It’s hard to say if he will see your attempts as some sort of betrayal but, I really feel, if he has not gone right over the top already, it is a risk you may need to take.
You are in a precarious position, but you are also in the best position to observe, engage him with you in talking and comforting him in his pain and PTSD and look for things that will pull him back from the abyss
Of course, you cannot understand what he has seen and done, but he is with you now and he clearly needs you.
I agree with the members comments in this forum, he needs the specialist treatment that should be available to him because of his service. Please don’t just take ‘no’ from these support services. You are his advocate and, you might have to get back to writing and ringing to get him the support he needs now.
Even though they are saying no to you now, push on for everyone’s sake. It is simply not good enough that having served his country,he does not receive all and everything he needs to assist him. It is a disgrace and I really feel you are going to have to be very strong and keep pushing and pushing.
Until you can get those specialist services, maybe offer to take him to the counselor instead of him going there alone. The counselor hopefully might pick up on his behaviours and even assist you in getting the proper treatment he needs.
Go well,
Kind regards
blackemerald1