Found this on another thread about ATC messages being blurred.
For people with Intel integrated graphics, go to Intel graphics settings and move the 3D setting slider (or any similar option there) from performance to "balanced". It's actually the graphics settings that causes blurred text. Make the graphics controller keep balance between quality and performance, it will get fixed
Don't know your graphics card being Intel or Amd or NVidia. Mine is NVidia and I'm set for Quality not Balanced or Performance.