I think a lot of it is the main characters and their interactions - it has been so amusing to see this one from both sides, with Michael egging Bill on a little, and Bill trying to avoid having to punish Michael too embarrassingly, much to Michael's chagrin. On the other hand I found Jessica more annoying, and she didn't have much in the way of longstanding relationships with anyone else so I just didn't get as invested in what was going on.
Yeah, the second was what my mind came to first when I was thinking about the title, but I kept thinking that "broken" felt a little strong, at least based on what we've seen so far. A while later I hit on that first meaning and that put a good smile on my face :D