@sassbott, I really hate parents like you. Your kids are not the centre of the world and if you can't control them so that they can play nicely without screaming, shouting, crying and winging, then YOU are the problem as the parent.
And yes , I had young children, and yes, I taught them that the garden was not a communal area and yes, they learn without hardship to enjoy themselves without boisterous behaviour.
I have neighbours on each side with 7 kids all together who would probably say the same as you. It's been obvious over the years that they re overwhelmed with their kids yet continued to have more despite the houses being 2 and 3 bedrooms. It's obvious they send their kids in the garden to get rid of them and they don't care for what they do there, as a matter they probably hope they let it all out so they are calmer when they come back in. The parents are never out.
It's a nightmare but like you, they couldn't care less. They feel hard done by but they chose to have more children than they can cope with. Why should others pay for it? Complete self-centered attitude.
OP, there us little you can do although we tell the kids to be quiet assertively when it gets too bad. Finally, they tend to listen until the next time.