The US visa system is very arbitrary. I got a 10 year B1/B2 just by showing up and handing my passport. No questions (a part from why are you going and where did you travel) and no documents asked. The whole interview was probably 30 seconds. The process didn't take much time but there are not many applicants in my city. I got my passport back in a couple days.
At the airport, I helped translating for a French national. He was sent to secondary. Then the agent just stamped my passport and waved me in.
Yes, it sometimes depends on the agent that's interviewing you. I've heard so many stories of this kind. Try again but try not to get interviewed by the the same person.
At the airport, I helped translating for a French national. He was sent to secondary. Then the agent just stamped my passport and waved me in.