This is a very dark and twisted series about a couple of misfit and totally dysfunctional characters. There are many plot holes but best to suspend all logic and just go with the flow. Don't try to analyze how things happen , just accept that they do and go with the flow of the story. All actors are suited to their roles. The ending of Season 2 would seem to be the finale as it would be difficult to see how another season would add anything to the story.