Is my ex a psychopathic nutcase?

Basically we dated a year and 9 months, I loved him and I thought he loved me judging by the fact he told me and he always said how special I was to him, and talked about the future together. But eventually things didn't add, and I got a gut instinct about breaking up with him because he was becoming distant and not as invested after coming back from Bali together. I broke things off and was really sad I still wanted him tho. But he said to me we have to move on etc while sending me mixed signals in saying that he missed me and how he felt an empty void now. I thought he wanted me back but then I saw him out in public with a new girl not one month after the split and I was angry at him and he smirked at me and told me to walk away. The new girl just smirked at me too like I was just trash and she was the upgrade. I was so heartbroken.

I became severely depressed and had suicide thoughts since I gave my virginity to him (I'm 24) and it caused me psychological stress and mental and emotional. I had to have counselling and then my nan died and i was devastated I emailed my ex telling him how horrible he was to me and that my nan died and he replied saying I was just a victim and he was aorry for my nans death but he wouldn't take my insults. Then he said that how dare u say our relationship was a lie and he said it was good for the most part and he still has fond memories of me. I was floored because he didn't show he actually cared at all or had empathy. ( He lied saying he hadn't spelt with his ex before me when he did and he avoided a pregnancy scare she tried to tell him about. And he lied and said another ex had committed suicide after she was raped. She was raped but she didn't commit suicide).

Then I find out he put a tinder account up a day after we broke up and he was probably chatting up girls while keeping me holding on. Now it's been 7 months and he is professing he loves the new gf and his ex before me emailed a screenshot of his tinder to me that he is still using even tho he's in a relationship. She swiped right on him and it was a match obviously saying he was wanting to get in touch over tinder. Then she messaged him saying hahah don't u have a girlfriend and he unmatched her. What is going on????

I'm not interested in going back, I find him repulsive now but I do want karma to kick in.