What to do if you wanna call out your shitty abuser but you are scared too? (TW REALLY GROSS SHIT)

Okay so it's been like FOREVER since I've been able to log into my account but this is the only place I feel safe enough to talk about it cause I KNOW they haven't logged into their account for over a year now, I've been wanting to talk about this whole situation and why I wanna call them out, they aren't famous famous but are kind-a known in a community we like called Combat Initiation they made this one drawing of the 3 main bosses over that one Miku mesmerizer song but besides the point, they did REALLY bad stuff and not just abusing / grooming us but abused our friends, isolated us and basically only wanted sex out of us a real quote from them "You always set such a mood but don't do anything" be aware we were joking 90% of the time plus they Sa'd us in real life, but their shitty little partner defends them saying "oh it happened years ago!" well I'm sorry I was groomed into believing that nothing was wrong with it but I'm not too worried about people not believing me cause of their partner no there is a literally VIDEO of his current partner talking to minors sexual while being over 21 but with my EX they dated not only a 15 year old while 18 almost 19 but after we broke up with them they went and dated ANOTHER 15 maybe 16 year old after we broke up? (who I helped luckily break up with them leading to their weird fellow child loving partner now) I have all their new socials and I have so much more I could say but I don't want this blog to be super long people of SpaceHey what do I do? I don't want my EX and their current partner? I'm only asking as I want people who don't even know the situation to give their honest opion as it would be nice to see points of view who weren't affected or know me OR them personally you know?