I've learned to pull the basic reports together and they hold up fine. But the second a report has to meet three different standards at once, I get tangled in which rule applies where. I sit there with a dozen tabs open, second-guessing every number.
More people experience this than they realize.
You can handle a simple report, but layered rules still tie you in knots.
If this sounds familiar, the Library can help you find the bigger picture.