I warned girls of my ex being abusive is that wrong?

I went into girl dating groups and warned them about his abuse. I didn’t put too much detail, just name, picture and that he was a red flag. Some girl asked me how I just kept it short with he was abusive, manipulative, etc. and any friend he’s tried telling lies about me like that I’m crazy I showed them voice recording of him admitting he does stuff to torture me and hurt me.

He’s been going around telling people online or mutual friends that I’m crazy and shows them a video of me which was after I was driving him, and him calling me names I pulled over to calm down cause it was giving me anxiety. He got calm & started recording me saying I wasn’t letting him leave. I just told him to calm down and tried talking to him like stop freaking out, calm down, etc. he tried driving and I was like no I just need you to calm down & I don’t trust you to drive. He also messaged people I went to school with that I’m desperate and lonely. That’s what kinda did it for me and had me start telling everyone.

He’s showing people that video and saying I wasn’t letting him leave.

is this wrong that Im warning people or telling people he’s like this. Usually I’m non reactive He put up a post about how he’s going to get me for defamation ?