It really does sound like it is time for you to look for a new doc. Especially one that specializes in adult ADHD.
I am not sure why he treats you the way he does. It kind of sounds like he is "old school" and just not up to date on current practices.
But anyway, here is some info that you might be able to use.
"The sooner we treat children, adolescents, and adults with ADHD the more likely we are to help them to minimize or eliminate self-medicating. Many well meaning parents, therapists and medical doctors are fearful that treating ADHD with medication will lead to addiction. Not all people with ADHD need to take medication. For those who do, however, prescribed medication that is closely monitored can actually prevent and minimize the need to self-medicate. When medication helps people to concentrate, control their impulses, and regulate their energy level, they are less likely to self-medicate"
and, "Psychostimulant medication when properly prescribed and monitored is effective for approximately 75-80% of people with ADHD. These medications include Ritalin, Dexedrine, Adderall, and Desoxyn. It is important to note that when these medications are used to treat ADHD the dosage is much less that what addicts use to get high. When people are properly medicated they should not feel high or "speedy, instead they will report increases in their abilities to concentrate, control their impulses, and moderate their activity level. The route of delivery is also quite different. Medication to treat ADHD is taken orally, where street amphetamines are frequently injected and smoked."
from - http://www.addandaddiction.com/articles.htm
And, here are two very good links on Adult ADD. Perhaps if you have more information you will be more able to advocate for yourself.
The first is quite good - http://health.usnews.com/health-news/patient-advice/articles/2016-03-07/a-call-for-better-awareness-and-diagnosis-of-adhd-in-older-adults
This is also very good. http://www.additudemag.com/slideshow/139/slide-1.html?utm_source=eletter&utm_medium=email&utm_campaign=may
I hope this helps. If I can be of further help with more information - just ask. Keep in touch!!