https://bugs.winehq.org/show_bug.cgi?id=35889
--- Comment #14 from Nikolay Sivov bunglehead@gmail.com --- It's not clear what's this is about. For someone to reproduce you need to provide a list of fonts (with versions) that you have installed, Wine font replacements settings, fontconfig settings.
About screenshots you attached:
https://bugs.winehq.org/attachment.cgi?id=47925
This one looks like grayscale AA rendering to me, most likely with hinting enabled, that makes certain parts lighter than they should be.
https://bugs.winehq.org/attachment.cgi?id=48055
This one is aliased, using bitmaps or not depending on particular font.
https://bugs.winehq.org/attachment.cgi?id=48056
This one looks like a fallback failure to me, because System font is mixed with Chinese glyphs.