I just found a link where you can report problems online to Microsoft Customer Service - though there are many different programs it may fall under.
https://support.microsoft.com/contactus/emailcontact.aspx?scid=sw;en;1539
I reported it as "blurry text" under "Windows" for "Windows 8 (& IE10, Office 2013)", and included a link to this page as illustrating my problem.
I will let you know if I get a reply, but in the mean time, it takes 3 minutes to fill in the form. If we all write in they might notice there is an issue.