These publications were headline-grabbing, but some of the study design was laughable. The whole state of affairs led me to leave the discipline (which led me to a career as a software engineer). I'm glad that I did, because the reproducibility crisis hit hard within a few years of me deciding to do something else with my life.
Some of the studies that I read made me think that there was a link between frustration (caused by e.g. undesirable outcomes in videogames, or performance issues like high latency) and aggression, but of course the researchers assumed it was the violence.