@Auspice Something I've found with respect to myself and multiplayer games:
Genre matters a lot. To use Overwatch as an example, I don't think I'm terrible at it, but I can easily lose track of my surroundings because I'm so focused on what I am doing versus my time or possible flanking, etc.
Starcraft II, on the other hand, I forget about base maintenance things a LOT. (I play co-op almost exclusively for SC2.) I've slowly started to get better about it, but I'll frequently catch myself with the expansion untended and needing more workers, upgrades that aren't in progress, and so on. Lately, though, I've actually started to catch myself more and more, which kind of makes me happy to be honest.
The point of this post is that I do think some ADD/ADHD behaviors can be, with time, mitigated. I make no claims that it's easy, but over the years I can certainly say that I've learned some control over some of mine. It's not always, and it's not completely, but I do see a difference. There is some anxiety over containing some of it, though, but one technique I've noticed works for me some of the time is (in MU*ing and other text-based conversation) is typing out what I would have said, and promptly hitting delete instead of enter.
Food for thought.