The more I see him in the real world the more very upset I become that I genuinely really liked his story. HPMOR is a banger, possibly one of my favorite pieces of amateur literature in existence.
I didn't know the author was a wanker at the time of reading, and now that I do, I want to make myself retroactively un-like his work, but I can't.
How does doing nothing help us at all?
Being out in the streets making a big noise means that the government sees their people being upset and the cops out managing the protest could be in danger themselves. Protesting in the streets interrupts business and draws attention. At best, it means someone knows you're pissed off and can't ignore you. At worst, it could scare the cops and politicians away from interfering in the protest - or even, force their hand into enacting the changes you're protesting for - due to concerns about their own personal safety.
If you enact a change in government and no one complains about it that means it is A-OK to continue this course of action. Silence is explicit approval when our only means of expressing disapproval is to speak up. If you aren't speaking up then you are expressing that you approve of the events that are unfolding currently.