When viewing the form in a browser the text is always crisp at any resolution you set your browser window. However once archived and viewed in the web client, you must set your browser at full screen 4k to keep the text crisp.
Example of what the text looks like on the form at 1080p
What it looks like in the repository at 1080p
What it looks like in the repository at full screen 4k
I used Chrome to get these screenshots, we are archiving as a native document.