I’ve largely done those things too until I got diagnosed, at 27. Since then I did adderall on and off, it works decently for me, however, the effects on my mood as it drains out of my system are not great. Mostly, I become extremely irritable. Lately I’ve been reading and watching more about ADHD, and Russell Barkley really changed the way I see the issue. I, now more than ever, see ADHD as a chemical shortcoming of my brain and I’m really pursuing the right drug or combination of drugs to deal with issues I’ve been failing to overcome for decades.
The inability to self-soothe and therefore outburst when you have emotions is an executive dysfunction that is definitely part of ADHD. As others have said, the degree to which you feel the emotions may have other components, but the inability to quell or redirect your emotions is definitely a normal ADHD symptom.