I give up

The total length of this movie is 02:39:50 and I quited on 01:21:18.
The name of this film is like some kind of biography, and the movie started with a lot of asides. Thanks the asides, without them I could never understand the story through the dialogues.
Prad Pett always acts some legends in movies recently. And I just don't know why so many audiences buy him.
The story should be nice cause Jesse 詹姆士 is some guy like heros in LiangShan to American people. But the rhythm of the movie is tooooo sluggish. There is always sharp edge for this kind of movie. It could be a great movie like A River Runs Through or a somehow slow movie.
Someone told that the later part of the movie is quite exciting. But for me, lukily I'm not living on movie comment writing, It's enough.