On Bras

How can bra designers be so bad at their jobs? Seriously, how hard is it to design a properly fitting bra that doesn't stab or scrap me in four places?
I'll admit, I'm not an easy girl to fit. But there are some common sense things we could learn.
For example, NO ONE buying a DD cup is going to be happy with those half-inch ribbons you call straps. Those won't hold up squat. All those will do is cut red, raw lines into my shoulders.
Same goes for that frilly bit of lace you included along the bottom. Sure, it looks pretty. And yes, that's part of what suckered me into buying it. But now it's hurting me. It has folded under and it itching me horrendously, causing me to reach up under my shirt and scratch myself in polite company. I will never buy a bra that looks like that again.
This goes for every other raw seam, unpadded edge and weirdly shaped underwire out there. I am not buying cheap bras, here, either. There is no excuse for this.
Sure, I could buy those big, white matronly things. They would give me great support. However, they generally seem to be made out of recycled army tent canvas and are no more comfortable than their highly decorated sisters.
And WHAT is with my straps falling down constantly?!?! Do I have uncommonly narrow shoulders? I don't think so. I'm built like a linebacker. Are these designed by men who LIKE to watch women reach inside their shirt every three minutes to haul up a strap? Can we possibly find someone inventive enough, creative and brilliant enough, to design straps that don't slip down to my elbows? Perhaps someday my bra savior will rise to power and create such a thing.
Give me a little help here, folks.