I don't mind rambunctious children, as long as they aren't hurting anyone, doing ear piercing screaming, or doing something that spreads disease. (Like putting their hands directly into ice cream topping trays instead of using the fucking scoop)
Frequently I see parents be way overly harsh with their kids where I'm at like the parent is terrified of being seen as a bad/lazy parent so they take it out on their kid by way over reacting to a kid doing something disruptive but ultimately pretty harmless.
There are occasional situations where the parent just dumbly stands there doing nothing to stop their kid doing something they really shouldn't (like that Ice Cream Topping example... which is a thing I recently witnessed). But that's less common than the former. Might be because I live in a rural conservative hellhole where kids are seen as their parent's property.