Yesterday I gently approached DH about maybe seeking some help and advice for his short tempered-ness (he is also constantly tired, drained and has sleep issues) all whilst complimenting him on the steps he's taken already (yoga, walks, sauna, breathing exercises, reading, eating better, drinking less etc) and how maybe a GP might be able to make any further suggestions or referrals (he seems certain he has ADHD but is reluctant to seek a diagnosis, I also suspect OCD).
I also mentioned that maybe some therapy might help. He didn't get defensive but listened and later he came up and apologied for making me feel uncomfortable (his words).
Yet, I suspect he won't actually get down to doing anything, again. He promised 'to do anything' after I broke up with him but later seemed mostly focused on me getting more respite, as if that was the main driver for the separation. It's like some sort of built in defence where he just can't turn to himself and really see how his behaviour has affected me and DD and how he won't be able to change that by just trying harder. Maybe he is scared to look at himself and speaking to a GP would be forcing him to do so and maybe that is too hard and painful.