Your struggles with work seem very similar to my own. I’ve been working at the same company for 12 years. I wear a few hats at work, and I think that’s why it took me so long to burn out, because the job stayed novel and interesting longer than average. But it’s not novel and interesting anymore, and I feel like I’m suffocating.
Which is to say, can you try looking for a new job? People with ADHD tend to “job hop” more than average, and I think that’s a good thing for us. Switching gears, and even just having something new to look forward to, are going to be huge boosts to your mood.
It’s probably not going to solve ALL of your problems, but it could help take some of the pressure off while you work on the other stuff.
For me, it just means I’m angry and depressed all the time, due to y’know… everything.