Soooo hard @FairerDingo. Sounds like he needs to reach rock bottom within himself before he will be able to commit to any sort of recovery.
My hubby doesn’t understand that he is unwell, so it’s the same with him. He is still exercising on a wrecked knee that he is due to have surgery on, and all I can do is sit on my hands and wait for whatever the outcomes are going to be. It’s so sucky !!!!
I can tell you that things don’t remain the same forever. I hope that helps you to grit your teeth and bear up a little longer. My hubby was being really emotionally abusive for a while, but circumstances conspired to change that by degrees ..... so hopefully all the hospital presentations are having an effect on your son, even if you can’t see what that is yet, and it might be just one doctor who says, “hey .... wait a minute .... what’s going on here ? I am going to keep you in overnight and run some tests, and then let’s have a proper talk about what is happening with you .....”