… so turn it off. It seems my struggle for a really nice, good looking, crispy font configuration is never ending. But hey, guess that’s what I somehow love. 
<match target="font" > <test compare="more" name="weight" > <const>medium</const> </test> <edit mode="assign" name="autohint" > <bool>false</bool> </edit> </match>
in ~/.fonts.conf will do the trick and turn off the Autohinter for bolded fonts. Sometimes they now kinda funny when in really small sizes, but you will get around looking them all blurry and crammed together in ‘normal’, bigger sizes. Matter of personal taste I guess.
Edit: Never mind, I turned autohinting for bold fonts back to on. Seems like setting subpixel-hinting to rgb totally fixed my issues. My bad for having it set to none all the time. :/ I’m done with fonts for now.
