I'll be glad if Brasil's image starts turning from corruption ridden banana republic to corruption hunting democracy. I see signs, and they give me a little hope.
That's very reductionist. A fourth democratic power in the form of the Public Prosecutor's Office ("Ministério Público"), independent of the regular 3 powers found in most democracies, was instrumental in uncovering the depth of corruption. It cut across party lines in unexpected ways and couldn't be controlled by the other powers. Its joint investigation with the equivalent in Brazil of the FBI had to be handed over at some point to the judiciary system. That's where they botched it. They had a chance of taking out a good chunk of the corruption cartel in power but didn't.