Great 85 Minute Movie...too bad it's 95

I was loving this movie. The atmosphere, the acting, the setting, I mean everything. I was loving the craziness of the recordings and everyone sort of going their own way and even the obvious parts with Gordon. I mean I was taking this hook, line and sinker. Then, out of nowhere the final ten minutes comes and it felt like someone came in and yelled, OK, ten minutes and that's a wrap. The final ten minutes felt like we had been suckered into thinking there would be this big payoff, but we're left with the worst possible outcome. The entire thing hinged on one of two things...an ending that blew us out of the water or a simple explanation and a scene where we see the result. What we're given was a somehow drawn out conclusion that took what we knew for fact and threw in something ridiculous. I looked and saw that this was to end differently and I wish it had, ambiguity and all.