I enjoyed the episode.
Daryl and Beth were drunk, and they've reached the point that they feel they don't have anything left to live for. They're at the end of their rope. So I can see how they would say the hell with it, torch the house, and head off into the woods, not really caring.
“They’re at the end of their rope. So I can see how they would say the hell with it, torch the house, and head off into the woods, not really caring.”
I thought the fire was to symbolize putting their past behind them and starting over. Getting drunk and doing something glaring stupid is smart in a Z apocalypse. If you want to do something, hook up in the shack. I thought that was where this episode was heading.