I've really only been pissed at myself for 2 reasons.
The first is when I was still in gymnastics and was doing my routine on uneven bars and just totally fucked it up when I had done it at least 200 times. It was a back kip circle which is like the easiest thing to do. I think i just got overly confident.
Other reason is when i knowingly let others take advantage of me. But I'm too nice most of the time and let it happen. Then i bitch about it. Then i realize it's my fault. It's really an awful quality that others seem to think of as a good thing.