I don't know what to tell you. I've got ADHD without the H. What you seem to be alluding to is par for the course for some of us with ADHD. Job changes every 7 to 10 years. And career changes too. Starting your own business might be the best bet for you. But that also might require some failures before you find what business you will be successful at.

Good luck. Keep at it. And keep a healthy mind and attitude.