>>108145401
There's no GUI setting for it, you need to fuck with libinput quirks.
I don't know how it got enabled, but I disabled it by creating a file in /etc/libinput/local-overrides.quirks with the following contents:
[Logitech Hi-Res Fix]
MatchName=*Logitech*
AttrEventCode=-REL_WHEEL_HI_RES;-REL_HWHEEL_HI_RES;
I didn't have any idea about this either, it just randomly fucking enabled itself.