As an outsider sometimes you are not aware of cultural norms, but I always felt the margin for error for what Americans considered "acceptable" was too narrow. There was no benefit of doubt, and sometimes an explicit dislike for someone who did not immediately fit in.
I always clearly explained that I am a foreigner and do not know how to do this or that and I was given ample information.
The one time it did not work is when I had breakfast in a diner in Arizona and left my table after paying. A lady (also a customer) dropped le and time me how come I can leave without bringing my plate back. I was so surprised that I asked "this is what you do here in restaurants? Cleaning after yourselves?". She got mad and told me how I was misbehaved and everything.
She was clearly a weirdo, though.