Goes both ways (if you insist to use the traditional political compass). GCJ is a perfect example of that. I use the "terminally online" word for these people rather.
Sure GCJ and other overly leftist subs are annoying. But there is a world of difference of spamming “[video game] is secretly about trans fem boy communism” by GCJ types. Vs alt right groups talking about (real life) minorities not deserving equal rights.
Subjectively, I avoid any overly politically forced sub. However let’s not push the “both sides” argument.
In my view, terminally online interest groups are responsible for the current protests against Reddit. Several of the smaller low traffic area-specific subs that I frequent have been taken offline (some threatening permanently).
But also, this could be an excellent platform to experiment and discover systems that DO work. I think it's worth trying in any case, as the status quote already "doesn't work" in an even worse way. Special interest groups grab control and there is no way at all to unseat them.
For better or worse, the best moderating schemes on a moderately large group is via a paid position. At least there a mod has a "boss" that you can hope to appeal to should they abuse their power. May not always work but it's more security than hoping an admin pays attention to a subreddit's drama.
See how the alt right infiltrates gaming groups. The reasonable voices are outnumbered and taken over.