It's the same story with pretty much any platform. While you may know YouTube as the tool where AI/software randomly bans innocent channels and demonetizes videos based on false positives, it actually has a small army of human moderators. These poor folks are constantly exposed to some of the most vile content humankind produces >! ::: beheadings, rape, torture, child abuse::: !< etc.
I once worked on a project aiming to help their mental well-being, but honestly, while a step in the right direction, I don't think it made much difference.
Edit: attempting to nest multiple spoiler formatting