I haven't seen Landman, but I have heard of it. My understanding is that all the characters are pretty miserable, but that it nonetheless weirdly glorifies their lifestyles.

I guess it is a bit like François Truffaut's statement that there are no "anti-war films". I imagine if some population segment has chosen to identify with a particular lifestyle (oilman, soldier, gangster, etc.) then it doesn't really matter quite how that lifestyle is portrayed so long as the viewer can make a connection with it.