AITA for not telling my ex-husband why our marriage ended?

So I(31F) was married for 5 years. We had a good relationship before we got married, and the first year of our marriage was amazing. The problem started after he started working from home. He’s a programmer. <br><br>He would put on these horrible headphones and ignore me half the day, refusing to have any sort of conversation. Or he’d play online games while I’m trying to cook dinner or watch a movie. I called him out on his behavior many times, talked about how it made me feel lonely and isolated, but he never cared. <br><br>When I started thinking about divorce, I had a conversation with him and told him that if things didn’t change, I’d be leaving. He didn’t seem to care, so I filed for divorce. It was a mess. He was livid, he tried to change and get me to stay but I’d had enough. <br><br>That was two years ago. We haven’t spoken since the divorce was finalized. We only communicate through our lawyers. <br><br>My ex recently showed up at my workplace, asking me why I left him. He said that no matter how hard he tries, he can’t seem to get over me and that he wants answers. But I told him I wasn’t going to discuss anything with him and asked him to leave me alone. He told me he couldn’t move on without knowing why I left him, but I told him that was not my problem. <br><br>He’s been texting me ever since, telling me he needs closure or he can’t move on with his life. I don’t want to have any sort of conversation with him, and I don’t think what I did was wrong but my mom is saying I should tell him why I left so he can finally get over me. But honestly I don’t care if he never gets over me. I have a right to protect myself from someone who treated me terribly. AITA?