I have a similar feeling towards my latest ex as well.

I want to write him a letter screaming (as much as you can scream in text) at him about how much he hurt me and that I've worked him and his games out.

I feel a little like I'm lacking closure since our last contact was relatively civil with me taking most of the blame but I also know that it won't help.

He wouldn't care and I would just be giving him the opportunity to hurt me more.

Stay strong. Block him and stay away. You're happy now don't let him take any more from you.