Regular text boxes are way better though the font might still be a little small.

Be careful with those fine point lines like you got on the whiteboard. When it got compressed the white ate into it from not having enough width and makes it pretty hard to read.

Think about classic cartoons and their use of bold lines to make sure the reader can be definitive with shapes and legibility.
Think of comic sans. It was popular for a reason. Even people with dyslexia find it easier to read for its standard shapes and even spacing. Don’t just rely on HD and a bug screen. That’s not everyone and your audience shouldn’t just be you.