“The winner of the game is the player who makes the next-to-last mistake.” - Savielly Tartakower.
The Review of this match, which is only a very analysis, determined that you made 4 mistakes, 1 miss and a blunder, to your opponent's 2 blunders. That's easily enough mistakes to lose.
I know that I played badly, and I admit that I was unfocused after half the game because of some IRL things out of my control. But that's not an excuse. I have played more seriously, and made fewer errors. But I think this is a good example of something I've read a few times that annoys me.