Ex is going nuts

For context she (F19) broke up with me (M21) for being working too much and unhappy from moving across country for her leaving my family and friends behind. I basically was completely unsupported by her and had no support system until I found my job where I’ve made amazing friends. There is a slew of discord arguments that she initiated. I have tried to be mature but in the discord I did loose my cool a bit which just taking a few jabs at her. I know I’m not perfect but I’m trying my best to get better.