From the sorts of things I've seen, it's anyone with "blue hair and pronouns", particularly if they have had a particularly viral moment that can be easily inserted into "Woke SJWs OWNED" clip compilations. Typing on a keyboard doesn't make for very good visual content, but I suppose posts clipped to show how cringe SJWs are is probably what you're referring to.
Somehow, I doubt you have a full picture of their political activities based only off what someone else was able to turn into ragebait.
Perhaps you should consider people as more than what they post on social media, especially given how many of those platforms have a financial interest in showing you things that make you mad. I don't see much political relevancy in the sentiment that the problem with the current political climate is that people aren't voting hard enough, but if you're committed to complaining online that people spend too much time online complaining and not enough time voting harder, then I wish you luck.