It's called a swindle when you get outplayed but manage to trick the opponent.
accuracy doesn't win games ?

The winner of a chess game is usually the player who made the next-to-last blunder.
The loser is the player who made the LAST blunder.
Nope it depends how bad the blunder is
Also it isn't the blunder that makes you loss it is he LOSSING blunder that makes you lose if you make it last

it was a 15/10 game, and if you think the eval bar was bad you should see our accuracy rating

Empirically, it seems rare for the loser to have higher accuracy (except when the win is not on the board).
i had a lower accuracy in this game
but I still won and won with mate.