I have a background in psychology and, in addition to poor boundaries, it seems (to me) like the family's biggest issue is codependency. Though I will say that I never expected Bad Daddy to join in on the dysfunction. He kind of had a sweet deal with being able to pop in and help with Jess and the dogs when needed, but then get to leave at the end of the day to go back home to peace and quiet.
I'll be interested to see how things go though. I remember when I first started following them a few years ago (back when Bad Daddy didn't really like being on camera and only made occasional appearances) they mentioned in passing that he's really into fitness and healthy living. He also seems to keep quite a clean house. So basically the opposite of how Val, Hannah, and Jess have been living. I don't know how long he's been living by himself at this point, since some people on here have brought up that it sounds like he was remarried at some point due to Jess' stepsister comment. However, I would think if he's been living by himself for awhile it might be quite the adjustment to go from one to four (plus two dogs and a cat) in a household. Especially, when those individuals are loud and messy.