I'm currently working on a project that needs one specific library that I didn't have time to code myself and there's only one other guy on the entire interweb

I'm currently working on a project that needs one specific library that I didn't have time to code myself and there's only one other guy on the entire interweb that built something similar, but the code is... Oh, the code is so craptacular. Just spent the last 5 days hacking through it. Emotional reactions? At first, joy to find the library. Then came disappointment, when I looked at the source. Soon followed by frustration, when I realized I had to go in. Anger as it proved harder to figure out the nonsense, quickly followed by fear and doubt when I wondered if I was going to make it. Hope, when I had a breakthrough yesterday evening and finally, joy again since I completed my changes about an hour ago.