Description:

Please see image but maybe non-reproducible by a simple screenshot.
Came from system with freetype **2.10.2**, same fontconfig settings (subpixel rgb, slight hinting), Gnome 3.36 to the freshly installed Arch system with Gnome 3.38 and JetBrains Mono white on black.

Font rendered in `gnome-terminal` looks very ugly at least on EIZO CG2420 professional LCD display. Classic colored "subpix artifacts" easily seen, much more intense, nothing like that occured in the previous setup with the same fontconfig settings.

It's no go for me for the "white on black" gnome-terminal. Haven't seen such strong artifacts in months.

Not sure if it's
1) Freetype 2.10.3 issue (Cleartype issue?)
2) Gnome 3.38 issue
3) gnome-terminal issue.

...but fonts in other apps (GTK) look OK. Moreover, gnome-terminal does offer only a tiny fraction of monospaced fonts currently installed on machine (community packages Roboto, Ubuntu... not seen) and only one or two variant of each font.

Additional info:
$ ls /etc/fonts/conf.d/
10-hinting-slight.conf 51-local.conf 69-urw-fallback-specifics.conf
10-scale-bitmap-fonts.conf 60-generic.conf 69-urw-gothic.conf
10-sub-pixel-rgb.conf 60-latin.conf 69-urw-nimbus-mono-ps.conf
11-lcdfilter-light.conf 65-fonts-persian.conf 69-urw-nimbus-roman.conf
20-unhint-small-vera.conf 65-nonlatin.conf 69-urw-nimbus-sans.conf
30-metric-aliases.conf 66-noto-mono.conf 69-urw-p052.conf
40-nonlatin.conf 66-noto-sans.conf 69-urw-standard-symbols-ps.conf
45-generic.conf 66-noto-serif.conf 69-urw-z003.conf
45-latin.conf 69-unifont.conf 70-no-bitmaps.conf
46-noto-mono.conf 69-urw-bookman.conf 80-delicious.conf
46-noto-sans.conf 69-urw-c059.conf 81-ubuntu.conf
46-noto-serif.conf 69-urw-d050000l.conf 90-synthetic.conf
49-sansserif.conf 69-urw-fallback-backwards.conf README
50-user.conf 69-urw-fallback-generics.conf