Unfortunately, I only remember the ending
In this film, two black-masked criminals held one man in a pit (or dry well) in the desert. They starved him for several days and waited for him to die in this pit. They often checked him and one of them even climbed down. I remember a scene where the hostage even ate his own skin from his legs. In my opinion, this is an arthouse, because I can not find it anywhere.
The hostage actor looked like Pierce Brosnan in the movie Seraphim Falls,
same thin and helpless
I watched it in 2010 or 2011
film exactly until 2011, no later