Before I dropped Reddit 2 years ago I was a frequenter of onguardforthee too. Canada subreddit had already been taken over by rightwing mods for years by that point.
I immediately dropped r/canada after there was an upvoted post about how Canada should switch to US styled privatized healthcare and all the top comments were cheering for it. Absolutely no Canadians talk like that.
Not surprising in the least. The author's research methodology is a bit clunky, but you don't need an LLM to tell you that the content on r/Canada is extremely conservative and that a lot of it feels inorganic. It's self-evident.
I know a couple of friends who were banned without warning from r/canada for super weak reasons while correcting right-wing misinformation so I'm not surprised.
When you go in, 7/10 of the top comments in r/Canada are all op eds by ??? given volume by PostMedia and even further right organizations. All the top rated comments are variations of generalizations on why Trudeau (which is now just a variable for insert subject non-conservative) is just the worst.
Thing is, there are real things to say, but it all gets drowned out by magnified lazy drivel. It's the one time LLM hallucinations are useful.
And the moderation group, if not responsible, is at least complicit.
The Canada Politics sub which is supposed based heavily on "substance" where a few bit of those users participate allowed the NatPo account post there. At any given day probably 3-4 of top posts is PostMedia.
If you bring up the issue you'll get your comment deleted.