Still better and happier ending than: Forever Fighting with Zariel forces till her death. Some humans even in our days prefer life in house as in prison, coming out only for food. So i dont think it's definitely bad ending. In this kind of house... with jacuzzi, cool bed, many space, books, artifacts, portals even in Avernus main city, elite food and drink and others stuff... With all of it this "prison" dont really looks so bad
