Well clearly resentment has been building for a very long time. Initial fear after the capital crushed the districts is beginning to run thinner and thinner despite the horrific reminder of the games. That is why Snow is so set on crushing that hope into the ground in the hopes that this can maintain the peace the capital has enjoyed.

It just goes to show that in order to make people complacent about the horrible things in the world, you either need to make them comfortable with it (capital) or too hungry to do anything about it (district twelve.) It's districts like eleven that have better food supplies but equal discontent that become the problem.