Haters only have one argument:

Rating: 9/10 (20 January 2016)

"This film is boring because he is crawling around and grunting for 3 hours. But the cinematography is good, tho."
Geez. Go back to your over-hyped cookie cutter Hollywood bullshit with lots of unrealistic action scenes and childish jokes. Yes, this movie is slow, and there isn't much of a story going on. Yes, the most part of Leonardo DiCaprio's acting is crawling on the ground and grunting. And yes, the cinematography is outstanding.
The point of this film is showing the struggle the protagonist has to go through to get his revenge, and I think the movie delivered this point in a brilliant way. Your lack of patience doesn't make a movie bad. But that seems to be the crowd nowadays. They want a 90 minute cliché film with a lot of action, boobs, funny lines and a "mind-blowing" plot twist at the end.
Also, saying that DiCaprio was only crawling and grunting shows that you people have no idea about acting. He didn't talk much, and that makes this character even harder to portray: with facial expressions. I'm not saying the performance was Oscar-worthy, but it was very good. And the other actors, especially Tom Hardy, did a great job, too.
This film is very much about atmosphere. And I'm not only talking about the filming locations, camera work and editing, you also need some empathy to feel what Hugh Glass must have felt. That's what makes the movie interesting and also suspenseful. Yes, I thought that movie was very suspenseful, believe it or not.
Next thing is, of course, the camera work. The amount of absolutely outstanding one shot scenes is amazing and shows the high professionalism of the cast and crew. Did you guys even notice that the whole battle scene at the beginning was ONE SINGLE SHOT? And also every other scene in the movie lasted very long. You feel like you're in the middle of it all. I know this is not new, but they do this on such a high level here, it's amazing.
I know this "review" reads more like a defense of the movie, but I couldn't keep this to me after reading all the "opinions". If you don't like slow movies, it's OK. But don't say a movie is bad or boring just because it's slow. Assuming that being slow makes a movie bad, "Dead Man" and "Only Lovers Left Alive" by Jim Jarmush are also bad movies, right?