There are huge swaths of people doing the work required to make it better, every day. It's not as easy as turning a dial from "bad" to "good"
Prosecutors in America have one goal: close the case. At any cost, close the case. They are not interested in justice. They are not interested in finding the one who actually committed the crime. They are interested in closing the case. If that is “working as designed”, then we need to change the design.