I do not believe that a subconscious and complicated decision means that free will is an illusion, though I guess it could get bogged down in how one defines free will. Throwing a ball to a desired spot requires calculations that occur on the subconscious level but does that mean that my throwing it to the glove of my catch partner was not an act of free will? On the higher level, I believe that the only thing that is predestined in everyones' lives is our dates of death, but how we live and how we die is very much the product of free will, yet also the will of others that affect our lives and the choices we need to make https://medium.com/illumination-curated/life-is-school-for-the-soul-9b081dbe8453