Baseball can teach a lot of life lessons. Setting realistic expectations. Obviously adversity, things won't always go your way, coaches/teammates/umpires can all be a pain at some point. There's not a lot of success in the game - you will fail more than anything else. If you're head and shoulders above everyone you will succeed more in the HS/college ranks but there can be a lot of teaching moments. Kids don't always want to hear that from their parents, but they should be having fun.
Meaning hey, maybe you went 0-3 today but you had a good approach at the plate and the pitcher just executed really well. Or you didn't get many balls out in right field but you were able to back up the wild throw from the third baseman when he overthrew on the bunt, and instead of the kid going to third we kept him at second. Those are small victories inside the game. Yeah it's fun to go 3-3, but that doesn't always happen.
If they're having absolutely no enjoyment, yeah maybe they do something else. It's always going to feel a bit worse in the moment, so I wouldn't rush for a decision until some time after the season.