Every single person in this story above you in the org chart catastrophically failed at their job; but I would say your direct manager deserves most of the blame.

The main priority of everyone directly managing individual contributors should be to make sure they can all do their respective job with as little interference as possible. Asking you to waste time by drafting an e-mail for them (aka doing their job for them) is bad enough. But the real failure is not shielding you from all those other nosy idiots afterwards.

Really hope they pay you well enough to make dealing with this shameless display of incompetence across all levels worth it for you.