The older you get, the more shame you are apt to feel if your ADHD is undiagnosed. Perhaps, you feel ashamed of what a mess your pocketbook always is in. Or you feel ashamed of how late you usually are, no matter how hard you try not to be. And, you feel ashamed that you haven’t made more of the abilities you were born with.
The shame may penetrate to deeper levels. You may feel ashamed of your thoughts, desires, and predilections. Likewise, you may feel the only way you can be accepted is by putting on a mask. In addition, you may feel that the real you is fundamentally flawed.
I know I feel shame all the time mostly because of my lack of impulse control and it's difficult to get out of my shame cycle when it starts but it is getting better, never easy when it happens.
www.ko-fi.com/livingwithadhdandcptsd
https://drhallowell.com/2017/04/26/adhd-and-shame/
https://www.verywellmind.com/adhd-and-shame-20435