Earlier quoted context omitted.
If you run into one of those where you don't have a choice, the best phrasing I've found to explain why I left was "hostile work environment." I had one of those for about a year and leaving after just over a year was a question I got used to answering.
Most people won't give a bad personal reference anymore because they are too afraid of being sued. We just say yes, the person worked here from this time to that time.
This is a cliche but it can't possibly be true. I mean, it is extremely expensive to file a lawsuit, you probably lose, and nobody will ever hire you again, because it is public record.