You didn't start this to become a full-time inbox manager. But somewhere between the kids, the house, and the business, email became the job — the thing that eats your time, follows you to pickup, and waits for you after bedtime.
You've tried the folders, the "inbox zero" videos, the 6am starts. None of it stuck, because none of it did the one thing you need: the actual sorting and drafting. That's not a discipline problem. It was never you — it was the setup.