I assume because some fucking ghoul noticed people liked taking them for their cars so now we just don't get napkins!
They were probably just out and too busy to restock or something. It happens. Never been to a fast food place where they don't provide napkins and I steal napkins from the taco bell I live near regularly. What a weird overreaction.
It had some really rough moments intertwined with some really well done moments. Overall it's fine. The shots of the cities and some of the fights were beautiful. I also really liked some of the zuko and iroh backstory that wasn't in the original show. Some of the dialogue was very clunky and they mashed up a bunch of stories into the same episode which felt weird and didn't totally work. I enjoyed watching it for the most part. It was never going to be as good as the original so I think going in with that expectation helped.