The juries made the correct decisions based on the facts and the law in both the Rittenhouse and Arbery cases. Rittenhouse was seriously discredited by his first lawyer, a venal person who tried to capitalize on the case at the expense of his client, prejudicing the public against him. The original DA in the Arbery case tried to prevent a prosecution, was defeated in her re-election campaign, and is now facing criminal charges for obstruction.
The system ended up working in spite of some of the people who are part of it.