I don't believe anyone wants to create a new legal system, but the reality is the vast majority of sexual assault cases aren't resolved in court due to existing social issues. These "judges, jurries and prosecutors" are just people who don't want to associate with potentially dangerous people regardless of the legal outcome. Beyond legal consequences to crime there have always been social consequences too - I think the major difference compared to the past is that these companies put out press releases instead of just blacklisting someone and moving on.
And in the years since we have killed millions of people in Vietnam and hundreds of thousands in the Middle East and we’re currently bankrolling what many people consider to be a genocide in Palestine.
There have been several successful actions, but we’re talking about the net impact not specific instances.
Military violence can make the world more unstable too. Especially when many civilians are killed. There is no way to actually determine if military action taken by the US has been a net positive for the world.