It is true that there are plenty of people who use reddit that are not racist (setting aside the idea that everyone who lives in a racist society, which we in the west do, has at least some internalized racism). Some people on reddit even actively fight against it, to their credit. That said, as a platform, both in terms of the people who run and administrate it, as well as the larger majority mass of users, definitely tends towards racism. This can be seen in all kinds of ways, from admins always siding with freeze-peach of racists over bipoc to the frothing-at-the-mouth hatred of the “orcish hordes” that dominates in every popular subreddit (and the silencing of those who offer even the mildest criticism of it), to the understandable yet very telling rabid defense of the privilege so many of them insist they earned when it is nothing more than old fashioned white privilege. You seem to agree that reddit is bad for its corporatist bullshit and its laser focus on profit at the expense of people. We agree. But that alone is inherently systemically racist for sociological reasons that I’m assuming you’re aware of, given some of your other comments. For all these reasons, it is hardly an overreaction or unfair to refer to reddit as “a racist website.”
As for “authoritarian” communists, all I’ll say here is that I hope you can learn to seriously, genuinely question a lot of what you have learned from what amounts to an ocean of propaganda deliberately spread for decades (even over a century) to demonize any successful socialist revolution. I’d encourage you to ask some of us “tankies” in good faith about some of that propaganda in other appropriate threads.