This is extreme. NOT just "ADHD and hormones". More extreme than my conundrum kid, and I thought mine was way over the top.
I know what it's like to trust the "professionals" and then find out they were wrong. But they can be. You have to trust YOUR gut feeling. You are the parent. It's a long fight to get help, but somehow we keep trying.
When did this behavior start? Grade 7? 8? 9? That's a common time for problems to surface. Some kids with major challenges but high intelligence fly under the radar until junior high or high school. Then, social skills become critical, and kids are beyond cruel. If he isn't "average" or "cool", he's an out-cast. These kids get bullied, and not just by kids - sometimes by teachers too. Anger in young men is often a manifestation of depression.
I don't have experience with drug abuse in kids, but that can start about the same age, and for a variety of reasons. But to me, your son's behavior is more than that.
Hopefully the psychiatrist was looking for more than just concussion impact...