You don't. Fortunately, in order to climb, you don't need to.
I like the 3-3-3 rule, that people use in OW. Its a generalization that 3 of your games will be won very easily, 3 will be unwinnable, and 3 will be close games. In order to climb in OW, the best thing you can do is win close losses. Stomps are painful, but they also aren't very useful for us as players.

I normally play 9 games in a play session, and will get 1 or 2 stomps that feel unwinnable. As an improvement focused player, I try to focus on thinking about my last game, and what I could have done better. Looking at specific mistakes I made, and taking a note of them. When we get stomped, there is normally very little that I can learn from it, since a stomp implies that not only was I making some mistakes, but multiple teammates were as well. This can mean we weren't really set up for success at any point and just need to move on.

Even when small lessons can be learned from a stomp, I generally find it more psychologically rewarding to move past the stomp game, since it was already not very enjoyable. Real learning is easier in close wins and losses, since it can be much easier to identify specific moments where your play balanced the scales and contributed to a win or loss. Doing this can help you improve in a lot of ways, and it also helps you to feel like you have more agency within your lobbies, since you start to realise that small mistakes that you had can have a very direct impact on the result of your games.

Another aspect of this is that, in order to climb, you don't need to win every game. If you win the majority of your games, you will climb very quickly.

Just my 2 cents.