[TeMPOraL]

Yes, but adults who have ADHD, but neither know it nor suspect they may have it, will look for alternative explanations to make sense of their consistent failures at things other people seem to handle fine. A common one they arrive at is character flaws. They'll see themselves as lazy or childish, and as they try and fail to correct it, they'll internalize guilt and shame.

"Surely everyone else gets distracted this much" is exactly the kind of belief that creates and reinforces feelings of guilt.