enz wrote:
I was trying to see if someone would teach me
I think there response meant I was so below them and was 'trash'
I admin in a couple active facebook groups full of teens, and it's common teen slang nowadays for them to say someone is "trash" if they are heavily obsessed with a thing, in your case, the Smash Bros game you mentioned. They might have been accusing you of being fandom trash, based off your detailed and hardcore-fan-specific question.
Being called trash in this sense is not as offensive as the other meaning, as some hardcore fans of things may even self-identify as [something] trash, though such a term still isn't very polite, especially when it's someone who doesn't even know you.
You did nothing wrong btw. Their unhelpful silly reply was just their poor attempt at humor.