Author copies/shipping costs

I’m new here, just uploaded my first books. I’m likely just venting but have a question also. I cannot believe how long the author copies take to arrive and how expensive shipping is. I really Bezos didn’t get rich giving stuff away, but 1. if we have Prime for our regular Amazon account, why is the shipping cost so high for our author copies? 2. And is everyone really waiting two solid weeks to get their orders? 3. How the heck are people getting answers from KDP help? Everytime I click on a “help button” it seems to take me nowhere. Anyway, thanks for letting me vent and if anyone knows the answer to these little questions I’d appreciate it.