The far left would be people like tankies, where they go so extreme they end up parroting a lot of the same rhetoric you see on the far right, just through a different lens. I've literally interacted with people on this site who believe North Korea is secretly a utopia that the West is trying to hide with propaganda.
They don't really have much in the way of significant political representation in this country. The far right unfortunately does.
I'd consider commies, anarchists, and anti capitalists in general to just be leftists, not far leftists. It's not really my thing but I can at least respect it.