Since there weren't any suggestions for linux, this is what I did for Ubuntu 20:
* 2x scaling
* Downloaded libfreetype, enabled subpixel rendering option, replaced existing libfreetype.so
(I think Ubuntu 20 might already have this enabled, but just to be safe I did it manually)
* Turned off all hinting options in font configuration
* Turn on lcddefault filtering
(necessary if you have subpixel rendering enabled)
* Specifically set 158 dpi in Alacritty terminal config
(Not entirely sure that's necessary?)