For example during COVID, Reddit was extremely toxic and hostile to any questioning of COVID lockdown policies. You couldn't even talk about travel in travel forums without being shamed as some kind of murderer and downvote censored to oblivion, let alone questioning the justification of lockdowns, border restrictions, and vaccine mandates.
Reddit has had an extreme woke left bias for a long time such as in its main subs like /r/politics. Of course this extremity on one side breeds counter extremes on the other like /r/TheDonald. The hivemind nature of the site ultimately makes everyone more divided and worse off.