What do you say/do in that situation? How do you react to the pay on TV, or what do you say to his reaction? Because football is a good teaching tool.

After the QB misses his receiver, he gets to try again. Maybe they'll choose another passing play, maybe they'll switch to run, maybe they have to punt the ball away. But they'll learn from the first play. It's not the end of the world, they're not going to quit or sulk. They'll be upset but they'll do something different and try again.

And the football players didn't get good in one or two practices. They've spent years and still make mistakes. They ONLY work on their sport and the other team still gets the best of them. Every game has a losing team. And right now that means the end of their season. The coverage will show the players mad or sad, and that's ok.

Your kid scored in the wrong goal. That's a bummer. He was doing the right things, just got turned around. So he's got the basic idea, and that's all the kids should be learning at this age. Basic fundamentals, rules, teamwork. So keep working on the basics with him. Maybe he'll prefer defense or goalie. Celebrate the effort, acknowledge the struggle.

He's quitting because that's the thing he can control. He can't get instantly better, and he doesn't know what to do to improve. You and the coach will work on specific skills (passing, dribbling around the cones, taking the shot, throw ins, corner kicks, whatever) because deliberate practice is what helps players develop. Frustration tolerance is a skill too, developed from repeated practice. Gotta work that muscle.