It gets that way when being pro trump gets you banned from r/politics, so all of those who are pro trump take over some other subreddit. It used to be they had their own, but after thedonald was banned they migrated to r/conservative.
The more you separate people the more unhinged they become. If you went back and talked about how reddit tried to hide that Biden was demented or that Harris was unpopular so would be a catastrophic election loss that would also have been onion worthy but today its reality.
That subreddit was taken over just like the conservative party in the USA was taken over. If you allow that to happen (both the party and the subreddit) then that's your problem. In other countries Trump would have had to found his own party, he'd still have captured a chunk of the vote but at least the Republicans that once were would not have squandered their identity. Now the house is on fire and it doesn't look like there are any mechanisms to stop it from getting much worse.
You don't let people like Trump near the levers of power if you want to keep your country in one piece. We have a similar problem here in NL and the only thing that saved us so far is that even the most rabid right winger will have to form a coalition. That still was a dime on its side and we'll see what happens at the next elections but single-issue-parties are less of a problem here, as are strongmen (though, like everywhere else, there is a fraction of the population that just wants to follow some glorious leader).
The election results were 77,302,580 votes against 75,017,613 votes, or 49.8% versus 48.3%.
I would not call that unpopular.