In my case I have to say that is only half true. As an adult-diagnosed ADHD sufferer I cannot say that I
developed coping strategies on which I relied excessively that masked my symptoms. Rather, I
used to try [0] to develop coping strategies, only for me to eventually drop them for unexplainable reasons at the slightest routine-messing incident or event, regardless of how effective the strategy was being or how good it felt. And then some time later I would [will] try again, under the blissful delusion that this time it will stick overriding the rational memory that I never succeed in setting up a system on which I can rely for the medium-to-long term. Rinse, wash, repeat.
I am now in a low, with no active strategy, and without the mental strength to start working on a new one. Hopefully though I will recover my mojo soon and organise myself again. And I'm sure this time it will stick...
[0] I still try to develop coping strategies, but I used to too.