It all depends on what you plan on gaining.
If you’re interested in an apology, let’s face it, you’re probably not going to get one.
If you’re trying to get back at him, it’s not worth it, don’t bring yourself down to his level.
If you think you might need to use him as a reference somewhere down the road, then maybe, but speak with a rov first.
I was in a similar situation once and I asked my Rosh Hayeshiva what to do. He advised against making any contact but if I insist he will help me write a letter, but he guarantees that I will not receive a response. Sure enough I wrote the letter and didn’t receive any response.
I then asked my mashgiach what to do and he also advised against making any contact. He did say though that if when I get married, have kids and a full time job I am still interested in making contact then I should feel free to. (I have no interest anymore.)
Best of luck with whatever you decide.