I played on, probably, one of the worst soccer teams in the country. Weekly double digit losses. In soccer. Still had fun. I didn't go pro as it turns out. Somehow, I suspect I wouldn't have, even if I'd been on the best team in the country... Is soccer skill actually a realistic long-term concern for your kid? Most people don't become professional athletes.

I mean, it is literally a game, he shouldn't feel the need to "fully commit." That coach just seems like a jerk, to me. Look for a lower-stakes league, maybe? Plus if your kid has put in a couple years on this super intense team, he'd probably be a super-star in a normal one.