Thanks for taking the time to share this experiences with us here. People like the one you described find amusement in their doings. They need the reaction to stay alive. That's what I criticized here on steemit. Many people wrote articles about people who started attacking them. Why? Why giving them any stage? I remember that I informed the famous abuse channel about somebody flagging some time ago. You know what reaction I got from there: none.
That's why I am leaving basically. It's Ok that people don't understand that they can't fight a troll by reacting on him and giving him an even wider stage, writing about him, complaining, talking about him.... But I definitely can't understand why the ones that supposedly dominate this platform in a positive sense don't create a place where to seriously help the attacked people. Well that's not correct. I somehow understand it. It's because they just don't care ;-)
The motivation of the troll is secondary. It's the way of dealing with these creatures that counts. On steemit they have found the perfect place to be.