Well, it's unfortunate that he's taking that kind of action against you. But you asked for comments, so here you go:
There are a few points where I chuckled out loud - and I'm a tough laugh. (But honestly, I skipped forward a lot because not much was happening, it seemed to me, so I probably missed some laughs) This guy takes himself pretty seriously and that can be pretty funny. The editing pointed that out a few times, and that's where I laughed. For example, near the top (which takes far too long to get going), you have a long, silent cut on him without your voice over. Then the voice over comes in and states exactly what I'm thinking. In this case, the silence worked, because it was a set up to a stronger joke which was a comment on the performer. (Howedver, it sounds like that kind of thing is what's getting you into trouble with this guy - editorizling on his personna/performance in a negative manner? Unless you were up front with him or he's got a great sense of humor and strong self image, that kind of treatment by the filmmaker isn't going to go over very well, IMO) I think the length of the film extends the depth of the material. Meaning, I was dropping out a lot because there were lengths where nothing interesting to me was happening. IMO, you should cut this WAY down. It's tedious to sit through at times, in all honesty. It feels like you haven't taken a real position on this subject matter, and are haphazardly throwing everything in. There's great stuff in there. This guy's kind of quirky and interesting at times. You spend a LOT of time setting him up, before his stage performance, so I'm expecting to be blown away by him performing on stage. And I'm not - he's just okay. He's got some funny jokes, but his payoff on stage isn't worth the set up time. The ending is jolting. Perhaps if you added music at the beginning and end, then I would know that the film was ending and not a mistake.
I hope this helps. Good luck with everything.