How does committing crimes "prove that the system is a failure"?
That depends on the nature of the "crime". If you had been incarcerated for possessing or selling a bit of weed, engaging in a peaceful protest, being Aaron Swartz, Living While Black, or simply pissing off the wrong LEO, then you too would likely feel that the system had failed. And you'd be right in that assessment. And there are cycles of poverty and hopelessness, (absolute breeding grounds for all kinds of violent anti-social behaviours), which are allowed to continue and sometimes even actively perpetuated by governments, law-enforcement agencies, and the attitudes of society-at-large. Again, FAIL.
Unless you are of the "it can't be my fault, the system is to blame" crowd.
No, it ain't always the system's fault, and personal responsibility and awareness are always to be encouraged and expected. But there are an awful lot of people in prison through no fault of their own, and a whole lot more who are there largely because of the contributory negligence of the society they live in. And the way most of them are being treated while in prison is pretty much a guarantee that they'll truly be bad-ass criminals when they are released - even if they were very minor criminals, or not criminals at all, when they were tossed in jail.