Coworker was adversarial from the get. He would always bully me by saying “You better do [BLANK]!” whenever we’d discuss tasks to be done. He eventually pushed my buttons too many times. I responded to his bullying tactic by yelling back, “IF I DON’T, WHAT ARE YOU GOING TO DO ABOUT IT!? Stop bullying me and let’s work TOGETHER on this!” I realize now he was fucking with my head.