I recently mentioned blurry text rendering in @godotengine vs Unity using TextMesh Pro and turns out, YES, this is fixable!
When importing a font, make sure to have Multichannel Signed distance Field (MSDF) enabled!
Pro Tip: If you're using outlines, increase MSDF Pixel Range to 2x of your outline size.
Read more here: https://docs.godotengine.org/en/stable/tutorials/ui/gui_using_fonts.html#doc-using-fonts-msdf