Watched the movie yesterday, didn't seemed like a bad one

It seems massively underrated. Like hell, it wasn't masterpiece but it was incredible IMO. Acting wasn't that bad, and I kinda liked movie's approach to the character. Rather than being focused on what his family was doing, movie was being focused on how Thomas character played out while he was trying to convince his family to do the right thing. I don't know what the hell happened with this movie that it is so low rated (less than 1000 IMDb users rated it) and it is so left out.