Violence doesn't bother me so much as to context of the violence. Same way with anything going on in a movie, violence, sex, drug use, etc. If the gangbanger, prostitute, and junky are portrayed in a negative way and not uplifted then I don't have a problem. That and what others have said about parenting.
Personally, I find what I call “violence porn” a good deal more disturbing than the mere portrayal of violence.
Violence porn is where the violence is portrayed in such a way as to make it appear interesting and exciting and for the audience to be sucked into identifying with the perpetrator. In particular when it involved identifying with the torment, degradation and humiliation of another person.
BTW, do NOT enter “violence porn” into a search engine. Other people mean something rather different from the way I use the term here. Yikes.