You need to change scaling from from "Maintain aspect ratio" to "Maintain display scaling". This option did not come for 59Hz, but came for 60Hz. This setting directly is not present in the options that Windows operating system provides. Instead this would be in the "display driver" that comes with your hardware.

For me when I right click on desktop, I get to see "Intel Graphic Properties", and in that go to "General" and I made the above change for the blur to get resolved.

You might have a different Graphics provider, and you should have something similar there. Just explore that also, and it should work out.

VGA vs HDMI changes the clarity, but not scaling. Scaling vs aspect ratio will be at driver level like I said above.

All the best.

In addition, couple of 'old' programs do not display well in HDMI, fonts get blurred. Follow the following steps per such program. After changing 'maintain aspect ratio' to 'maintain scaling', I still had problems with some selected 'old' applications. So I followed the procedure here for those 'exe' files on my system, and they were also fixed.

Hope this helps.