> the whole modus operandi for desktop environments is not made with e-ink in mind

It used-to be in the DOS and terminal days, and it wouldn't take much to get us back there. Shut off all the eye-candy transition effects. Make your web browser, PDF viewer, etc., always scroll a full page at a time, instead of scrolling 1mm when you click on the button or use the mouse wheel. Just those few changes and you'll have something that'll work pretty well.

The problem is, you can't doom scroll 1 minute videos on e-ink.

It's a feature of course, but most people don't realize it.