TikTok employs a lot of moderators and they go much farther than facebook or twitter by hiding or removing videos that are not upbeat or fun.
People download TikTok specifically for the fun and upbeat content, so negative content naturally does not rise to the top (unless it is particularly comedic.)
Of course since the news has come out:
>TikTok spokesperson Josh Gartner told The Intercept that “most of” the livestream guidelines reviewed by The Intercept “are either no longer in use, or in some cases appear to never have been in place,” but would not provide specifics.
How far you believe them is up to you.