I think that's being way too charitable.
In a world where people are incarcerated on a scale unprecedented in all of human history, and where prosecutorial success is measured by number of scalps taken, the assumption that this is plain malice designed to let the state rob a few more individuals of their freedom makes much more sense than it all being just a big pile of incompetence and misunderstandings.
And crimes weren't solved, people not prosecuted, criminals not punished
For much of history life didn't even exist, that's not an argument for or against anything
Modern western police forces, with all their foibles, are far, far, far better than mob justice.
Are people even aware of history, and how absolutely bloody it was, with an immense lack of personal rights?
Fixing what's broken now is good. Trying to pretend it is worse than what was before, is absolutely absurd and laughable.
Foucalt has his critics, but it's not immediately obvious that the massive incarceration problem in some Western nations is better than public execution at the whim of monarchs. And some forms of torture, Foucalt argued, have changed from the theatrical and public to the more subdued torture of everyday lives of prison inmates.