Mechanism 1 — Working memory volatility makes follow-up feel like new work
Neurotypical delegators delegate a task and then carry a low-grade background awareness of the delegation. When the work comes back, they remember what they delegated and can quickly evaluate whether it matches what they asked for. The follow-up cost is small.
ADHD working memory is more volatile (Kasper et al. 2012 meta-analysis, ADDA's working-memory explanation). By the time the delegated work comes back, the founder has often lost the original task context. They have to mentally reload the entire situation to evaluate the delivery: 'wait, what did I ask for again? what was the expected output? does this match?' The cognitive cost of follow-up is much higher than for neurotypical founders. Worse, the follow-up cost is invisible at delegation time — you delegate, you feel relief, you don't realize until later that you've created future work for yourself.
The brain learns: delegation didn't actually reduce my work; it shifted work into a worse-tasting form (verification and re-loading). After two or three rounds of this, the brain concludes that delegation is a bad trade.