I can't disagree entirely with your post but saying because I install my own dishwasher is leading to the thrashing of America is a stretch.
I do believe you when you say you see a real decline in the quality or workmanship.
Of course I didn’t say that about you individually or any individual so don’t pretend that I did, but the Home Depot era is vast and all encompassing and changed America from homeowners being told they can do it, to every unemployed guy with a pickup becoming a tradesman, it also introduced truly junkie building materials and fixtures to America, absolute junk, from toilets to faucets and I hear the same about materials used in other trades.
Home Depot introduced nationally not only the badly installed faucet, but the disposable faucet, this is the replacement for professionally installed faucets that used to last 35 and 50 years.