SUBREDDIT: r/AskReddit
TITLE: Reddit, what makes you insanely mad?
POST: Something that makes me mad happened today. I'll start by saying I respect when people can be straight up with me, i.e. if they don't like me, and they tell me, I respect that. So, what happened: A while back I assisted a friend in making a short film. They recently asked me to edit their work. I am okay with this, do it, and return it to him. 

I am told everything I did was crap, essentially. He said it politely, but he also apologized for even getting me on the project in the first place. Nothing I did was used. Nothing I did was of value. Hours of work. Wasted. I want to destroy things. What makes you mad, Reddit? Let's be mad together.
TL;DR: 
Guy gets me to do job for him, tells me that he never wanted me to do it in the first place, hours of work lost.