I have had periods where W10 was usable on certain devices. On one laptop (circa 2019), the latest Windows 10 was working fine (with original 2012 display drivers for the laptop) but others here were complaining it was causing symptoms.
More recently I installed the latest Windows 8.1 on a known good 2010 W7 desktop. It caused symptoms within an hour of use despite using the same Windows 7 drivers that have worked fine for years on a W7 install. Installing W10 on the same machine caused issues, too.
However I have access to a more recent Dell latitude laptop with 21H1 installed which isn't perfect but is usable.
The other elephant in the room though, is apps are causing strain independently these days even on good setups. @si_edgey can you run the latest Firefox on your good setup without issue? I cannot use the latest Firefox for more than an hour without discomfort. There are many other apps that are 'unusable' for me on good systems, such as Kodi, Plex Media Center, RetroArch, VLC, MPV & Mednafen.