There is an American site ask.com. I don't think it is as nice as this one. It seemed very pick-up oriented the few times I lurked there.
I do fairly well and don't struggle with the translations too much. I know about the rhyming slang, so can sometimes figure it out on my own. Most are happy to help in that respect.
As for the argy-bargy, I suspect that would be on any site or any gathering of people. It is distressing to hear that people have gotten threats on their personal email or when some make overt threats here.
In general, I enjoy the site and those on here.