Cheated, abused, traumatized me… yet he’s posting like I was the problem. Why?

I know it’s not healthy to keep checking his social media, and I’m really trying to stop, but it’s been hard. The waves of missing him come and go, and even though I don’t think about him much at night, I still somehow end up on his page. Today I saw him reposting things that make it seem like he was the one who let me go, like he’s the victim in all of this. One post even said, ‘no revenge, you’ll look for me in them and never find me.’ And I’m just thinking… sir, you cheated, traumatized me, abused me, and gave me an STD. You cannot be serious.

He always painted his exes as cheaters or people he had to walk away from, so now I find myself wondering what story he’s created about me. Why do narcissists do this?