I recently did a clean update of fedora and found the font to render quite blurry.
What I found out:
1) gnome-tweak-tool font settings do not work. At the time of the post any of the font settings did not make a difference.
2) You may start trying to use font-tweak-tool or font-manager. Be aware that these may create font config files in your ~/ or in ~/.config
These may need to be deleted so that your gnome settings take precedence.
Note: I've installed microsoft and ubuntu fonts for linux.
So what's the fix?
a) Go to Settings > Fonts and change the settings here to Anti Aliasing: rgba and Hinting: full
At this point your terminal should look good.
b) For me, firefox and sublime text had bad looking fonts.
There's a directory in /etc/fonts/conf.d that controls some additional font rendering. It's odd that there's no GUI to modify this directly.
sudo ln -s /usr/share/fontconfig/conf.avail/10-hinting-full.conf /etc/fonts/conf.d/
sudo rm /usr/share/fontconfig/conf.avail/10-hinting-slight.conf
Log out and Log back in and things should be clearer.