I recently upgraded to Ubuntu 18.10 and after upgrading, the fonts are all messed up.
I am using Acer Aspire E15 Laptop with resolution of 1920x1080p with aspect ratio of 16:9. The fonts are all default.
Font Manager:
Sample:
41 Answer
The use of Font Manager didn't help the situation much. Use the Tweaksapplication, and make the settings look like this...