Of course, this is what I expected to see when you claim far right content isn't a problem. You are severely biased to think that The Donald was anything other than a cesspool of radicalism. The dude has been a lifelong con man. He was an utter failure (and traitor) as a president, as was obvious from the start.
Reddit is full of whatever a dogwhistle becomes when everyone can hear it. Just whistles, I suppose. It is shockingly easy to find racists commenting about IQ and 13/50 bullshit in any subreddit that isn't actively moderating against that, let alone one that encourages it like the Donald.