Oh my fucking God. Why do I have to be so attuned to Microsoft Word?

This is a screenshot of a list. Except you can't tell it's a list. It somehow managed to hose the style to just... show a black rectangle for the numbering. What I set it up to do is automatic list numbering. Not whatever the flying fried fuckbucket this is.
Word, how did you even manage to screw this up? How?!
Saved the file. Closed Word. Word won't open the file anymore citing corruption. I'm seeing an unclosed XML tag. Closing it somewhere that seems reasonable makes it unhappy, too.

I'm not getting paid enough for this shit. LibreOffice, your font rendering might be unbearable to look at godawful, but at least you've never failed me quite like this.
@rq aren't docx files compressed
@ada Just fancy zip files