In a recent Match-up on chess.com, I played against a strong 2250+ player on chess.com in the time control 3 | 0.  I had some difficulty winning this game, and in fact, it was resignable for me when I blundered a piece early on. However, I continued to play and eventually went on to win the game because my opponent lost on time. 

Take a look at the game, and I think the important point here is that, in chess, it is worth playing till the very end if there are going to be even the slightest chances of a comeback. This game is an example of that. I used my pieces to make the position as complex as possible to drain extra seconds from my opponents clock, and eventually, he went on to lose the game. Enjoy the game.