I have tried so hard to be supportive of the post office but they do not make it easy. I can't tell you how many times I've gone to mail certain parcels and how many different rates I've paid for the same package depending on how the postal worker interpreted how to determine the fee.
I've literally mailed the exact same packaging of the same product five times over a period of five days and every single time was told a different thing, charged a different rate and was either denied or offered certain services depending on the person on the other side of the character.
The other stupid thing is how complex they make shipping packages with too many confusing options and fees such as certified, registered, delivery confirmation, signature confirmation, priority, first class, parcel post, media mail and more.
Make it simple folks - make the rates and packaging standardized and cost effective. Make it not unpleasant and then maybe, just maybe, people will keep coming.