The worst part about MS Office isn't the direct user experience, because I can usually choose to use other software. The worst part is that I and everybody else are subjected to the documents that Office produces. Their defaults and their UX inevitably produce stuff that is hard to read and inconsistent, unless you fight the software really hard and make sacrifices with your desired output. And there's no escape from it. Another specimen of Word's 2.5 cm margins, 200-character lines in poorly designed knockoff Helvetica will probably find its way to my mailbox before the end of the day.