I think USSR really did influence the world in a big way. No debates, just stating my stance.
It is great that you participate in what you do, and I advise any socialist to act the same, but it doesn't mean you can't do both.
Fight the system in existing framework, but don't forget it's not the only way. Think revolutionary, but do not settle for that alone and fight the system by legal means too. One shouldn't exclude the other.