I have no experience as a user, but I've heard about it in the past and have been following the keffals story. From my understanding it was a site largely dedicated too, or encouraging, or at a minimum allowing people to dox trans people and harass them by contacting employers/friends/family etc with pedophilia accusations. Keffals has been lobbying Cloudflare to drop hosting/DDOS protection for them after being forced to move to a new country, and due to them having a large online following for support they're having way more success than a lot of other people that they've harmed in the past