You are carrying the whole thing, and there is no bottom to the pile. If it feels like the business only works because you never stop, you are not imagining it, and you are not weak for feeling worn down by it.
Read the two situations below. One of them will probably feel more true than the other. Start there.
What is usually going on here is not that your team is weak or that you are bad at letting go. It is that the business was built around you, one decision at a time, and no one ever redrew your role. The fix is not working harder. It is deciding what only you can do, and deliberately handing the rest away so the place can run without you in every loop.
When everything is urgent, nothing is, and that is the trap. The problem is rarely a lack of hours. It is that priorities are unclear, the day gets hijacked by whatever shouts loudest, and good work never gets an unbroken stretch to happen in. The way out is a simple system for what matters most and a way to protect the time to do it.