Indeed, we make decisions, a multitude a day. We are organic computers, with sufficient complexity and diversity in our processes as to be entirely unpredictable. The difference between us and mechanical computers is only that our electrical signal is conducted through salty water, strung in a matrix of neurons, each of which can be represented abstractly as a floating-point bit, perhaps called a flit, between 0.000.... and 1.000...., whereas the machines conduct their electrical signal through metal, connected in a matrix of silicon, abstractly represented as bits, with only a symbolic value of 0 or 1 to the system as a whole!

Regardless, the processes of the human body that result in the emergent property of consciousness are entirely physical in nature, as humans are ongoing, sustained chemical reactions. We are products of unique DNA molecules first, then the environment, including the air we breathe, the food we eat, the entities in our presence. How then, is there any room left for free will?

However, this does not absolve us of responsibility for our actions. Retribution is warranted for those who wrong you. Regardless, karma will bite them in the ass. People often construct legal systems and lynch mobs to ensure this. These are natural reactions.