Reddit stopped being the "truth" when the moderation became too extreme. It created echochamber that were mass market and strongly biased to the far-left, and with that the echochamber also resulted in a very strong bias towards American users - most international subreddits are utterly stupid because they are dominated by American interests.

Quora used to be more centrist. And it had a major boarder appeal globally. But it too has been turning towards a Reddit style moderation within the past few years.