Thanks for sharing your experiences with both your Beats and your Mac products.
I guess if you believe everything in the universe must balance, your misfortunes with your devices were balanced out with my fortunes with mine. Sorry, wasn't trying to make light of this situation and I can fully understand your frustration with the level (or lack thereof) to get these resolved quickly ... or even to having to have them repaired in the first place.
I have been using Apple products, in earnest, since 2006. Actually started with a Apple IIc before then. A lot has changed since then. Can I say, definitively that the quality of Apple products have changed? Yes! ... but, not necessarily for better or worse. I still have a 2006 Mac mini, a 2008 Mac Pro, and currently responding to your post with a 2010 MacBook Pro. They all still work, and work well. I do have newer Apple devices, but it's still too soon to tell if they will be more problematic. So far, they work perfectly.
I hope these experiences do not leave you with an overall negative view about Apple products, but it would certainly be understandable. You are always welcome here. Whether it is for assistance with issues you're having or even with helping others with theirs. We all gain from these exchanges.