This has just happened with the September 2019 release. Power BI Desktop looks fine on my small laptop screen. Move it across to my larger 2nd monitor and the font is blurry to the point of being unr...
I have the exact same problem with my larger monitors.
Normally as the only report designer for my enterprise, I use bigger monitors to make sure the report looks the exactly the same to me as to any user. Now I can't do anything, as I will have to wait for this to be fixed.