Unfair Draw Due To Insufficient Material

As the title says, the game ended with a draw due to insufficient material, but if you saw the game you would see that this is not right! There is an actual way to checkmate using just your knight, if the opponent has a pawn on the rook file and this is exactly the case.

I think this is a glitch on chess.com and I don't think it's quite fair. I lost a good numbers on game on time, where I was king vs kind and 1 pawn, and I had the opposition, but apparently when the time ended I still lost on time because my opponent could in theory promote his pawn. But in reality this would never happens because I won't gave up the opposition. 

So if you lose the game when the opponent has a potential win on the board, why the system declared this position as a draw when I have a potential win scenario?

Here is the link to the game: https://www.chess.com/game/live/146137774366

According to the FIDE rules you would win but chess.com is using stupid USCF rules.