If you got the parts to fix this long list of issues (such a long list though...) then we seriously got it together, right? Seriously now, we're human - there are mistakes, happens for all tiny and huge manufacturers. I can only assure you that exactly the same kind of buttons get into all similar joysticks out there and this is one of the very few complaints we've ever heard about it. The aluminum posts? Even if they're not perfectly polished that shouldn't interfere with the way the hat switches work - the posts is simply pushing a switch and release it - it doesn't travel nor slide, so not sure how a part not being mirror shiny could interfere in such a bad way.
About the axes being reverted - that's really silly, sorry. All flight and space sims provide an inversion option in their axes menu for exactly this reason - some joysticks are reversed and others not. Same joystick could work fine in one game and would need axis reverse for other. Again, all games offer an inversion feature. We do too, in our native software - if interested I could explain more.
I'm sure the reason you won't buy another joystick from us is that you know that this specific joystick is extremely reliable and won't need replacement too soon

Otherwise, not too sure, but there should be plenty of great choices even at a better price on the market.