Golfis :
Have you tried opening a new file and setting a custom resolution? You could for example set a 6000 x 4000 resolution for you document and scale the writing accordingly
I knew exactly what would happen, but just for demonstration purposes...
Take the original jpg
Increase to 6000x4000 as recommended above
After a few minutes of optimizing....
This is part of the RA in "Crafted"
Looks like absolute crap. Don't do that.