They are made from the floor sweepings in Sony's factory.
You don't hear about the failures because most people just buy them and throw them away. I would venture to guess that about 60% of their customers are one-time buyers that try to power it on once and throw it away because it doesn't work. The other 40% either won the lottery or put up with its constant stream of shit because they have a near monopoly. The same is true for 3d printers.
Out of at least a dozen people I know using them, every single person has multiple RPis that has been in pretty regular use. On top of that you have a plethora of documented uses and projects across the internet, ranging from home automation to arcade machines.
You seem to be painting an entire community with the same brush, but most of the people in this community would gladly help you solve the issues you seem to be facing. Perhaps the issue lies not with the RPis but with how you're using them....
In reality, fully working raspberry pi boards are normal. I must have at least 10. I admit I no longer use the original model (so slow) but last time I tried it worked just fine. I think that's pretty great for the money, especially considering the state of the market before they came along which I think you might be forgetting.