But I very often do precisely what I wish. I wanted to make this post, and here I am making this post! The fact that my choices are determined doesn't mean they don't reflect what I want.
So according to the definition of 'free' that you gave, I do indeed have free will. My choices are not under the control of any other individual, and correspond to my wishes.
The point I'm trying to make is that definitions are arbitrary, and according to some definitions of 'free' (like the one that you posted), we do in fact have 'free will'.
These personal statements nailed it!