Ebay are not going to change this.
As far as I know, Simple Delivery is only used in the UK.
Your choices are simple and stark - adapt to SD or stop selling on the site.
I know you say you are a technophobe but realistically, if you are able to list on the site, add and edit your photos, access buyers' addresses etc, then you would find it fairly straightforward to access and print a label or download a QR code.
If you like selling on Ebay, if it brings you in a little income while enabling you to offer your unwanted items to a wide audience, then I can only suggest you give Simple Delivery a try.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)