It looks like you took a good gamble trying to win. And there's no shame in that. Your gamble did not work out.
Also, in this instance, the game might not have been as theoretically won as you thought it was, with all the pawns on the same side of the board, so don't beat yourself up over it too much.
I would just go through the game with the computer and see if there was any specific move that caused its evaluation to jump in your favor. See what you missed, and why. Probably one or two neat moves/combinations will jump out at you, and you will recognize and pounce on them in future similar situations. Computer analysis also gives you confidence that your opponents aren't perfect, either.
I know I was at my best when I focused on a mistake I made in a game and said, okay, I'm not going to make that mistake, or that sort of mistake, again. I'll know to check for that. For instance, I remember a particularly tough loss back in high school, to a future IM who was two years younger and 500 points higher than me. I won the exchange early, but he slowly snuck his way back into the game. It was tough to revisit the game, but when I did, I found a lot of clever tricks he used that I was able to pass on to future opponents. The big one I remember was: my rook was on e1, his pawn was on a2, his knight was on c3, and he played Nb1. Ouch.
In your case I would read about how to draw when a pawn down, maybe with R&P vs R, and once you've nailed that (along with the "Bridge" position to win R&P vs R), you'll have learned a lot. Maybe you'll even be able to hold your own position down a pawn, until an opponent loses a pawn and suddenly worries more about what they lost than focusing on the current position.
The bright side is that if you get a pawn down, your opponent may not be 100% sure of their winning position. They may be thinking "What if I blow this?" And that may allow you a way to get back in the game and get a half-point or even full point you don't really deserve. Gaining points you don't deserve, and losing points you do, tend to balance out in the long run.
So maybe you can't control heat-of-the-moment blunders beyond checking every move for crude attacks/undefended pieces, but you can control if you learn or nail down or internalize something that will be important later.
I would frame a bad move as "this loss motivated me to learn more about (endgame X). The loss hurt, but it will pay off in the long run." And if you are worried about blundering a winning position, have faith in yourself that you can and will study what went wrong.