I mean, if you take a look, /r/conservative isn't exactly a bastion of lucid discussion. Case in point:
https://www.reddit.com/r/Conservative/comments/iytx49/locati...
Implying that protesters are out there burning down houses (they aren't) and that the huge increase in size and number of forest fires lately isn't a result of climage change (it is).
The real problem isn't that liberals are over-represented on /r/politics, but that most people who identify as "conservative" on Reddit and elsewhere have gone so far-right or conspiracy-theory or troll-hard that conservative outlets lately tend to be mass-producing more propaganda, right-wing content, or misinformation. If you're an actual conservative who hasn't been sucked up into this psychopath right-wing bubble, it's difficult to actually find content that isn't pandering to those who have by posting deliberately misleading or outright false articles.
I feel bad for anyone who believes in legitimate conservatism, because their viewpoints and political party have been so completely co-opted by the fascist far-right and alt-right that there's not much else for them to do but vote dem or join the lunatic fringe.