I have to disagree about Luke. He continued to do frankly abusive things and as I recall refused to leave because he knew better. I think that the difference between him and Madison, and i do think it is a big difference, is that she is clear a out what is better for her, whereas Luke insisted that he knew what was better for Hannah. There is a whole different psychology at play there.
In terms of both-sides i wonder if part of the problem we have figuring out how to think about Madison is that we are so jaded about the show. It may be possible that you go on TV to be on TV and still buy the nonsense the show is selling about finding true love as the goal. Then if you throw in the fact that you are left isolated in the house being run like rats in a maze and you just get caught up in the supposed love object. And since you don’t see yourself as a posee you think they aren’t either.