Austin has 2.57 murders and nonnegligent manslaughters per 100K. Same year, SF has 6.35 per 100K. So SF is twice as bad as Austin. Your right about Miami though.
But 6.35 isn't bad. The murder rate in St Louis (for comparision to the US city with the worst) is 66.07 per 100K. And Colima Mexico (worst in the world maybe) is 182 murders per 100K.
https://en.wikipedia.org/wiki/List_of_United_States_cities_b...
https://en.wikipedia.org/wiki/List_of_cities_by_homicide_rat...