oui I regained my sanity, reintroduced my mouse and instead tossed away my mechanical keyboard. A laptop only setup has brought me some peace of mind. Also installed a little laptop stand on the back cover of my ThinkPad, a slight tilt and increase in height has improved my laptop experience a lot.
I have come full circle:
laptop only -> desktop -> SBC desktop -> (desktop-like) laptop setup -> laptop only
The only computers I own now is two ThinkPad X260s (one as daily driver and the other one for compiling, rendering and as a benchmark testbed). Lastly a Raspberry Pi 4 as a server, all running NetBSD of course.

