1.
I found the guy pathetic. No friends in the real world, so he had to travel to Alaska and live with Bears to feel love. Sure there were some people that he interacted with in the "human world", but he remains tragic in my eyes.
I don't question your basic reading of the film, but since there are important differences between tragic and pathetic that these comments somewhat blur, I still prefer my word, tragi-comic. "No friends in the real world" is also an overstatement which the interviews with several very devoted friends belie (remember the actor). He undoubtedly had trouble succeeding in any work or fitting in in the world, it's true. But friends he did have.
The character is complicated, and Treadwell believes he is finding himself out in the wilderness.
Certainly true, but what makes this a great film is that Herzog is partly finding himself too, so we are actually finding both men through Grizzly Man.

2.
With the narrowing gap between theater and DVD release, your wait for a second viewing may not be such a "damn long time."

3.
As I should have said perhaps, but left out for the sake of simplicity, "We're not going to make a snuff movie" was what Herzog said in an interview , not my personal choice of words. Herzog's use of the audio-only tape of Tim and Amy's death is considerably more significant and germane to Herzog's concerns than merely hearing the tape would be. We've heard people groan and wail before. In the scene, he listens to the tape with Treadwell's closest female friend, and then says he thinks she should dispose of it. This is such an important moment that it is the only time we get a glimpse of Herzog himself. The exchange in this LATimes interview contextualizes the tape data in a more complex way than the mere audio would:

Q: Had you done that before, interjected yourself into a film?

A: Not to such a degree. In this case, I did not want to appear in person in the movie with the exception of one key moment where I'm listening to the tape [an audiotape of Treadwell and Huguenard's final moments as they're being attacked by a bear]. I was allowed to listen to the tape, and it was instantly clear: We're not going to make a snuff movie. It's not going to be in the film. And, actually, I'm not important in this moment. You see me from the back with earphones on. But you see the face of the woman who owns the tape who was very close to Treadwell. She's trying to read my face. [She has never heard the tape.] Like almost a mirror image of my face and the anguish on her face. It [the scene] has great intensity and great anguish.
This is also another comment on your statement, "No friends in the real world." I recommend this interview, as a valuable commentary on Herzog's intentions and his experience in making the film.