You‘re absolutely correct imo! But the reason for white supremacists (i.e.) being able to seize power is users being unwilling or unable to stand up for themselves or others.

On reddit (same as here I assume) users can demand mods being removed from subs and new ones instated instead.

The ultimate escalation is making a counter sub with a close enough name and just doing better. That and informing, posting about the issues will massively improve the situation.

It is the fundamental problem with democracy. It is fragile as people need to actively keep it alive since power hungry people will always abuse and undermine it.

Organizing, sharing and keeping your own ego in check in the process is very hard but the ultimate democratic task imo.

Because it is easy to think of all our own ideas to be best but they rarely are. We should concentrate on those we know are better and find others to help with theirs.

TL;DR: Evil powers rely ok the indifference/lethargy of the masses. Work towards positive change