The short answer
You're not a quality controller — you're stuck in a fear loop. You don't trust your team because you haven't built a system that earns your trust. The bottleneck isn't your inbox. It's the belief that only your eyes can catch what matters.
You've become the ceiling of your own organisation. Everything slows down because everything runs through you. Research on professional stress is clear on this pattern: the more control we try to hold, the more anxious we become, and the more anxious we become, the tighter we grip. It feeds itself. What started as high standards has quietly become a coping mechanism for fear.
Marcus wrote that a well-ordered mind does not bring trouble upon itself — it does not lead itself into fear. Read that again. The fear you're managing by reviewing everything is fear your own mind is generating and then handing you as a reason to keep reviewing. Your understanding, as Marcus put it, has the power to rule over this — but right now you're letting the anxiety rule over your understanding instead.
This week, pick one type of outgoing work — one category, not everything — and let it go out without your review. Tell one person on your team exactly what 'good enough' looks like for that task, in plain terms. Then let them send it. You're not lowering your standards. You're testing whether the fear was real or just a habit. One category, one week. See what actually breaks.