It's the lack of nuance that makes any conversation far <direction>.
I was pretty left wing until the whole AOC "scarcity is a lie" wing of the party started taking over all online conversation. I'm sure the same applies to conservatives and Boebert/Greene nutjobs.
I'm sure whether you see Reddit as left or right is mostly colored by the comments and posts that stick out to you, and those are probably the ones you find crazy or distasteful.
He's very classist though. Not wanting to give someone something doesn't mean you don't want them to have it, and he definitely conflates those two to give himself the moral high ground constantly.
I have the opposite experience. Try discussing pretty much anything (from latest news, to car repair, to salad recipes), and see how quick it goes to bashing GOP and Trump supporters. As a non-USian myself, this gets really tiring pretty quick.
A considerable chunk of the left-wing in the US would be considered right-wing almost anywhere else, so it's no surprise a non-American would see it that way (seeing how the majority of Reddit users are American)
Europeans keep saying this but Le Pen got 41.4% of the vote in France, so... you_cant_explain_that_meme.jpg
Also good to keep in mind that the US core Democratic party platform is only able to purport positions that have a reasonable chance of winning over some of the moderate right wing in the country. They're constrained by whatever the moderate right thinks (for better or worse)