The people complaining don't know anything about storytelling.
Max is an outsider. He doesn't know this world he was captured into and doesn't care. He just wants to escape and be on his way. He CANT be the driving force of the story just like he wasn't the driving force of the Road Warrior (the people in the camp were).
Max was an outsider and wanted to escape and be on his way in Mad Max 2 and Mad Max 3 as well, and was still able to be the protagonist with several lines in the movie.
Big difference between Mel Gibsons Mad Max and Tom Hardys Mad Max in these movies.
A whole different portrayal.