Hey there, myself and my ex were best friends for 5yrs before we were together for 2 and a half years until I found out she no longer loved me and had been cheating on me. I packed my stuff and left, I was devastated. 3 months have passed by and I am slowly coming to terms with her hating me (she was my fp so it was hard to leave her) 

We are both gamers and made a lot of friends in various games. A lot of mutual friends were made by us. Now, as I am moving on with my life, I still game with some of our mutual friends until yesterday. We were both part of a friends discord group, she left last month yet came back on Saturday with a new username and then I woke yesterday to find I'm kicked from the server, deleted and blocked by a lot of mutual friends and banned from talking in the twitch stream of one mutual friend. Basically she has been bad mouthing me, making things up that I've said about people then gave them the choice of me or her to game with/have as friends. 

Now in a way it's good as she has removed people that weren't really friends out of my life but having major issues with being abandoned, I spent the day yesterday curled up in bed as I couldn't bring myself to interact with other friends in case they were mean and rejected me too. 

Why would anyone become so toxic as to ruin your online gaming and irl friendships too? Why would she take my issues and use them to hurt me like this? She has PTSD due to a lot of childhood trauma and I helped her through this, not used it to hurt her like an ex did in a fight with her. She knows how much it hurts to have your issues used as weapons against you yet she chooses to use my issues as weapons against me. Why are some people so hateful?