['I worked hard at winning a competition and ended up losing to my coworker, it made me pretty upset.', "How close did you lose by? I bet at the next competition, you'll wipe the floor with them.", 'I lost by underselling 40 boxes. I still am a bit upset that my coworker got it instead. Thank you, I hope so!']
Understandable, when you put so much work into something only to be eclipsed by someone else. Not a good feeling.
I was in a competition at work, and I undersold by 40 boxes, so I lost the competition to my coworker. I was pretty upset.