yesterday I almost got my second ribbon but I played like sht heads up and lost

i'm soooooo pissed. It was the charity tournament on carbon 5$ entry, 50$ added, 18 registered. I entered the final table chip leader, or close second, I went heads up 30k against 15k to a guy I almost knocked out 2 times in that tournament, I was sure I was going to win but I played the worst poker and lost

i'm so disappointed