Were you bullied all your life for being a fat person and that's why you've become a bully? I don't have much sympathy for you after your antics.
When I was in grade school (I dropped out in 7th), I might have been teased for being fat, but I wasn't really "bullied". But that's not the issue I have.
I'm going to tell you a bit of my life story. My biological parents emotionally abused and neglected me when I was a child. For 17 years, I lived in that hellhole in the middle of nowhere, 10 miles from a small one-horse town. My biological family were no better. Always lying to me and manipulating me.
But I'm not going to elaborate on that here.
So, yes. I'm VERY fucked up. My depression really emotionally cripples me sometimes. It seems like very much I'm drawn to try to make other people miserable, much like you. Difference is, I'm trying to improve on that.