Oh my goodness, I saw that show just last night!
I was a little disappointed, thinking I had missed it, but then when I saw your description of the rasta family and "jah" lol...
I really did feel sorry for Katrina when it was time to say goodbye to the children. I missed the big blow up that led to her leaving the house

(I must have changed the channel at a commercial).
I could see he did feel badly when she started to tear up talking about not being able to properly say goodbye to the kids she'd fallen in love with over the past 2 weeks.
I could understand why he was feeling defensive. She was resentful towards him for having to deal with the children most of the time while "he went out and played too late", and it seemed she picked at everything about their life style so I think she came at him too hard and broke him down a little. And he was such an easy going guy!
Other than that, I mostly felt sorry for Katrinas daughters! Troy came across as a real ass. I think the girls really liked the mom they got

I know I did, she was pretty cool