I tried different font settings in the font settings and it didn’t improve much (font hinting, anti aliasing, custom DPI settings, different font size)
The font is the default one which is Ubuntu Regular with font size set to 10
Sub pixel order is set properly to RGB Linux Mint xfce
Even when running windows in a virtual machine, the font rendering in it is miles ahead of what I got on my Linux setup!!!
This is almost always a compositor issue, and unless something is terribly wrong, only affects certain applications that don’t properly use the composite rendering method. First, find out which compositor you’re in (probably Wayland if a modern distro), then find out which apps seem blurry. Last step: force those apps to use your specific compositor (start searching for runtime options for the app).
Should fix it.