Earlier quoted context omitted.
Urgh, Reddit is indeed an addictive, toxic timesink of a filter bubble. It reminds me of Slashdot, but on a much larger scale. I have been reflecting on ways to fix it lately. I was imagining something like reddit, but... 1) not completely anonymous / pseudonymous. Maybe a profile photo with you holding a sign with your username for verification (like certain subreddits do), first name, and SMS / phone number verific…
YouTube is as bad or worse as reddit. The more you look at one topic the more it is shown to you. You end up in a feedback loop the same thing.
Reddit is by no means clean; they just don't care about, as opposed to actively facilitate, this stuff. But you're right in that there are deep problems on YouTube, too.