Thing is, I still don't get what these protests are about, or who are they aimed to. To me, they all look so random.

It's seems to me that it's just a bunch of people that think that the situation is bad, but don't what is wrong, or whose fault it is or what needs to be done ir order to get things fixed.

What are they aiming with this? What would make the protest end? A price-drop on bus fares? The cancelation of the world cup?

I think they want someone, somewhere, to notice this and magically fix everything.