So you need to manage up?
This can be tricky and a little dangerous if done too aggressively. You are not trying to manipulate, but finding ways of working with your manager for your own sanity and the business profitability and reputation. You could consider going above and stating the business case for why your manager is not effective but you would need factual evidence based on numbers and it may backfire entirely.
First, start to mirror your manager's communication style, the more you can put your view across in the same way, the more they will actually hear what you are saying.
Talk to your manager about their goals and your goals and priorities, try and get some mutual understanding between the two of you. Consider asking to be involved in the meetings for a concrete business reason, remove your annoyance and feeling like your manager is incompetent. Be factual and unemotional.
Formalise regular interactions, feedback meetings that get put in the diary. Ask your boss I am wondering if until you are happy with the template in its entireity can we hold off implementing it so we are not doing the same work. Something like when doing the template for the report, I noticed it changed a lot, I had to repeat the work manually 5 times for all 95 cases. Is there a way we could test it by only running the first few until we are sure its right? - Note the change from I to we
Ask your manager for feedback, are there some tasks you could take control of?
Give your manager more specific options and communicate precisely, something along the lines of: Here’s the deal with X. I’ve thought about A, B, and C, and I think we should do C because … Does that sound OK to you?
Try not to take things personally, accept that you might just need to grit your teeth and get on with repeating your work, try and reframe it, so you are not wasting your time, you are working and developing the report to ensure greatest customer satisfaction. Sometimes things can't be done once, there may have been meetings with the stakeholders who have said change X or Y. When I design a commision, I accept and allow for up to 3 major changes before I then will charge for any more. I would have done each one to their specification but they then see the reality of how it works and change their mind.
Finally, educate your manager, explain the impact, explain your role and the limitations of the subject matter. Ask if she would mind gathering the client's needs and wants but not saying yes, but that she will go back to the designer and see what can be achieved within these wants and needs. Again, give the factual business case that it will build the reputation and encourage further work.