My husband was diagnosed with ADHD as a child. It caused him many issues as an adult and he finally started medication about 5 years ago. The meds helped, but he refused counseling or life coaching. In the past year or so, I have observed that drinking has become a large problem. He is also off his meds and likely suffering from depression. He denies all of this.
I think that ADHD does make this harder. I think it is important that you work with therapists and doctors who understand both.