4chan
4chan is the social platform everything Reddit has been wrongfully blamed of comes from. It was first launched in October 2003 as a successor to Futaba Channel (or 2chan). It is mainly known across the internet for being both the place where most memes were created and also for being a hellhole of incel culture and depression.
/b/
/b/, also called Random, is the most active main board on 4chan, it usually is unmoderated.