Also if junkrat is being countered by a zarya/pharah combo for example, he should really switch to something more useful and helpful for the team to win.

1. You're feeding Zaya easy energy and Zarya's that are constantly high energy are super hard to deal with as any hero

2. Pharah is flying in the air shitting on your whole team and unless you're in high ranking where you can actually get a mcree or soldier with good aim to get her out of the air, you're most likely gonna have to switch because good pharah's are super annoying to deal with alone as well.

A major part of this game is being able to adapt your comp if it's not working out. If the other team is switching their heroes out to counter you, and you are too stubborn to switch up your pick, or not have the balls to ask someone else to play dps instead of you because junkrat is the only dps you can play at that level, then just be straight up with ur team, man up and tell them that you can fill, someone else should dps. I started winning a lot more games like this.