I just upgraded to Evernote 7.10 from some older version (did not make a note of it), and I am experience the "ragged text" look in all Notes and all fonts for the first time. Mac OS High Sierra.
Of the posts here, this describes the issue well: https://discussion.evernote.com/topic/117526-ragged-text-resolution-in-latest-update/?do=findComment&comment=531103. It does seem Retina (my laptop) vs. non-retina (my larger monitor) related, and I agree it seems like this would be a simple fix.