What you're seeing is the Windows Text Scaling interacting with the dialog text. Unfortunately that's not something that can be fixed in CC3+ at the moment. I recommend setting your Text Size to 100% in Windows, and instead increase User-defined scaling if otherwise everything is too small.

See my attached screenshot, though it is in German, sorry.

Here's the map I created during the mapping session.

Here's the map I was working on in the video session.

And here's the map I drew in the mapping session yesterday.

I'm using an

• Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz, 2808 MHz, 6 Kern(e), 6 logische(r) Prozessor(en)
• with 16GB of RAM
• and an NVIDIA GeForce GTX 1060 6GB graphics card.

Nothing very special in this day and age.