I don't know why you thought that you were losing. Material balance seems to be equal, your opponent's rooks are useless, and his queen doesn't seem to be dangerous for you. So you can bravely take his pawn with your rook, threatening mate in 1. If he tries to block your checkmate, you simply fork his king and rook. So simple. Your opponent didn't even have an extra piece. You had about 4,5 minutes to calculate all this sequence
How Do I Find Checkmate Sequences?
What you were afraid of when you thought you're losing? Or you simply didn't notice that rook capture?
There's a way to find out if there's a win or isn't. And that way is to think and try to figure it out.
In the game above, the winning move (Rxc7) is pretty easy to find, and you still had 4:40 left. You spent 6 seconds on one move, then 5 seconds on another, and decided to escape to a draw. Why would you do that?
In this game I forced a draw because I thought I was losing but when I went to the analysis I had mate in 5, this has happened to me many times now, Ive tried checkmate puzzles and Im quiet good at them but the only reason for it is because I know i have checkmate but in real games I dont find them