WAYYYYY too slow moving, but even worse the drama simply never got that intense. There simply was sooooooooo much more they could have done with this story. The tension was nearly nonexistent, no suspense, the big moments came and quickly went without upping the ante too much.
Even on the dialog front nothing seemed to happen. We get NO further development after the funeral scene about the 3 brother's relationship with their father. We get no development at all about the relationship with the mother. We know the father drank a lot, abandoned them, and the mother raised them to hate the new family. That's it. Sorta flimsy.
It's a movie with absolutely no payoffs on any front.
I can appreciate a movie featuring incredibly understated elements, but not when those elements fail to come together to deliver something powerful or engrossing.