What are you thinking about right now? Do you even know why you are thinking about that thought or why that thought even entered your mind in the first place? I didn't think so.
The control you have over your thoughts and decisions is equivalent to the decisions you have over your heart beating or your bones making red blood cells. But what does this have to do with free will? Simple, it is how people define free will. How many people define free will is their consciousness on decision making. This is simply a mass delusion.
Our brains make decisions before we are even consciously aware that we have even made the decision. So, if free will is the conscious ability to make decisions then free will is nothing but an illusion.