Can anybody relate?

My ex was a victim of sexual trauma on two instances. About 6 months ago I discovered he had been both posting and responding to ads on Craigslist to men, woman, transgender and whoever else he could find to either sleep with or receive oral sex from and once even offered oral sex too. I’m very progressive and would not have cared if 1. It wasn’t happening while he was in a relationship with me and 2. He wasn’t being so reckless. The whole Craigslist thing started about 4 years ago (we have been dating on and off for about two years). He was faithful the first year of our relationship but after our first big fight he became unfaithful. That’s when the Craigslist ads along with other dating apps started again. He deals with depression (possibly may have other mental health issues but is not diagnosed) and said that he would get super drugged out of his mind and go on there to punish himself by putting himself in similar situations. He has done trauma therapy before but the entire time and after he did it he was still on Craigslist. As someone who has a history of self harming I never would want to question someone but he does have a history of compulsive lying and some of the times on the ads are dated in the middle of the day when he was at work. I’m not sure if this is the right page to ask on and if not could someone point me in the right direction. However, have any of you with a history of sexual trauma experienced something similar? I hate to question someone who went through such a horrific thing and hopefully can learn from others.