I don't know. All I can say is
1. I inherited from my dad. He could go into "outer space", which means either total silence and blanking out, or monopolizing conversations.
2. Both my parents were/are "misfits". Although not poor, we never fit in or were identifiable members of the communities we lived in.
3. My dad grow up in an era where men did not ever admit any weaknesses. Fortunately, things were a little better when I was growing up, but things were not quite like today (or have things really changed)?
4. My older brother did not have ADHD. He did just fine. He socialized fine and was seen as stable and mature. I was seen as unsocializable, hyperactive, and inappropriate.
5. I was diagnosed with ADHD as a little kid. The neurologist wanted me put on Ritalin. My dad, fortunately, refused.
6. One teacher used corporal punishment on me, but it was another teacher who humiliated me for having ADHD and taught the rest of the kids to treat me as not socially able to participate. For the rest of my school years, I was very quiet and well behaved but had zero self esteem.
7. There was no Mr. Myagi from the Karate Kid. There was no significant adult outside my parents who could be a positive force for me. I sank into the abyss, and oftentimes felt like I was a martian from outer space.
8. Adulthood did not rescue me. About ten years ago, diagnosed on the Autism Spectrum. Went to three years of sessions with a group, and it was a waste of time. Fellt no commonality.
9. I am Middle Aged now, and I still wake up many mornings and feel blue about it all. Sometimes, I don't even know whether it is ADHD or something else. All I know is that it hurts everyday. The humiliation and pain is daily. I don't remember a time in my life where I felt okay.
10. Avoid living in the past. It will suck up all your energy and put You in a deep depression. I fight that every day. I exercise every day. I try to live right, but if I let the past humiliations due to ADHD take control of me it takes me hours to get out of that depression.
11. Life is very hard, but it is really, really hard having ADHD, because You look okay and people punish me for not being okay. And this is not just a bad attitude and low self esteem. You are not quick in this World and You lose. But I am not going to dwell on that. Have to think positively every day, and not let that past suck me into a depression.
12. Lastly, I am not an easy person. I have a hard time having empathy for others. It is not that I do not appreciate my blessings. I do. It is not that I cannot see that other people have real pains. I see it. I just never have seen anyone who has been through what I have been through in my particular way. It makes me seem difficult, stubborn, and argumentative to others. I tend to be like a prosecuting and defensive lawyer about everything. Someone says things are this way. I try to show another way of looking at it. Causes problems.