Wow, just wow. In the dugout.
I think baseball is worse for a few reasons. The coaches have more control than soccer, baseball is more position specific and you can really bury a kid (or a parent can think you are). It's easier for parents to blame a coach when their kid isn't doing well. You hurt their confidence by batting them last, you only played them in the outfield, you didn't give them a chance to pitch, you didn't throw them as many pitches in BP, or you threw hard to them than to other kids etc, that aspect can be absurd.
It's also harder to tell the difference between kids in baseball. The top kids always stand out, but those kids in the middle of the bell curve are harder to differentiate for parents who see them only make a couple plays in the field or get 3 at bats in games. Parents rarely watch practices so they don't see what you see and can easily think their kid is as good as or better than a kid who is really much better, but hasn't shown it in games (small sample size or whatever other reason). The coaches kid struck out (in an 8 pitch at bat) their kid struck out (3 straight pitches) why does the coaches kid bat second and their kid bat last?
In my town baseball is a much more social event than any other sport, we have 4 LL fields in one complex right next to each other, so you see other teams playing more, compare the kids more, talk to other parents more, it bumps everything up big time, some parents get really involved emotionally. No other sport in town is like that. I think many towns have multi baseball field complexes so this is probably pretty common.
I also think many people equate LL more to travel sports than the recreational level, even though it's really recreational in the regular season. My middle son is 10, there are two travel basketball teams for his age in town and two for soccer, there are 8 teams in our AAA LL level where he plays. You get a lot of parents who are much more into it than their kids are in LL compared to travel sports where there are tryouts.