Death Hunt: Based on "Mad Trapper" true story... but HOW much truth?

Okay, so I just watched "Death Hunt" with Charles Bronson and Lee Marvin. Pretty intense! I know it's loosely based on the story of Albert Johnson, the "Mad Trapper of Rat River." But I've also read some stuff about the real events and, uh, the movie takes major liberties. For example, the movie really paints Johnson as this wronged, noble dude driven to violence by a corrupt Mountie. But history seems a lot murkier? Like, was he actually innocent of mutilating that dog? The movie makes it seem like a total setup, but accounts I've read suggest he wasn't exactly a saint. And the whole 'revenge' angle with the trappers hunting him down... I'm not sure how much of that is Hollywood fluff. That said, even if it's really exaggerated, it's still a REALLY entertaining flick. Bronson is badass, even if his version of Johnson feels a bit too heroic for the source material. So, my question for anyone who's seen it (or knows the real story better than me!): How much of the movie do you think is accurate? And does adding all the fictional elements actually help or hurt the story? I'm really conflicted! On one hand, it makes Johnson more sympathetic, but on the other, it feels like it kinda white-washes (or is it brown-washes, haha) a potentially much more complex and morally ambiguous situation. I just feel like they took a really interesting historical event and then, for lack of a better word, 'action-movied' it! Anyway curious to hear others' thoughts!