I feel your frustration, man, I really do.
But you have to step back and take a look at things :
1) Microsoft doesn't build computers. They're not trying to break older computers to sell you one.
2) Win10 is a free OS. They're not gaining profit from normal Joes like you and me using it.
3) There's tens of thousands of defunct manufacturers that still have equipment all over the world, from whole computers to every conceivable mix of obsolete individual components. Supporting all of them is impossible.
You're in the same boat as I am with my old 2003 XP laptop that I keep around for unusual occasions - it's the equivalent of a '49 Hudson. You can't find parts for one, and there damn sure isn't any kind of support for it.
Interdum feror cupidine partium magnarum Europae vincendarum