This is one of the many times where Sam Hyde's reputation hurts him. If Ian didn't know who Sam Hyde was then a lot of the gaslighting would have been a lot more effective. You can sort of tell that Ian knows that Sam Hyde is fucking with him and is a bit defensive.
But I'm going to disagree with a lot of people here, I don't really think Ian was doing the doc over some 10-year-old grudge, he doesn't seem like that kind of person. He doesn't even necessarily try to paint his subjects in a bad light, not to say that he doesn't show negative things. Honestly believe that Ian went into this wanting to capture an authentic Sam Hyde, something that I don't think anyone has ever seen, but what he got was Sam Hyde fucking with him. I can see why he didn't release it, it just doesn't work with what he was aiming for.
Overall, it's a bizarre but intriguing creation from two people with opposite motives clashing over a week long period.