Why Reddit is such an echo chamber?

Everyone knows it is lol.

I made a video about it (I know, shameless self promotion). Why is Reddit so WOKE?

But if you can't be bothered watching it, It explains why the time period where reddit became popular where left wing views were very popular, and how the mods slowly agreed with more and more extreme beliefs, leading to them viewing the right as an evil enemy, causing conservative users to be banned.

There's also just the way reddit is a bunch of small communities, the upvote downvote system and more, but I didn't really explain that in the video.