Of course, free-will does exist, but in its stated absolutism merely as an ever-lasting desire in your head. For the same reason, freedom in practice is not a theory of absolutism, but one steeped in collective relativity.
Free to Whom?
You see, free-will, and freedom, in general, can only work well in practice when the pursuit of individual freedom does not infringe upon the freedom of others. The pursuit of free-will of all individuals paired in an N:N relationship with collective interests of all social constructs one belongs to or desires to belong to (citizen, work, family, and others).
Individual freedom must be paired with collective freedom, the freedom of others, to not induce conflict to turn the collective interests against you. Hence, freedom for all can only exist when it is guided by paradoxical rules of freedom, for freedom without rules to protect the interests of others turns into attempted pillage and plunder from which we as descendants of great apes have so gracefully emerged.
So, free-will can only become a reality when paradoxical rules of collective freedom guide its implementation. The latter sounds complicated, but we have implemented such a system for many years now as our very system of traffic.
Traffic defined as a set of rules that allows anyone to determine their destination (free-will), but as you travel, the interest of all travelers must be maintained to ensure (not guarantee) nobody runs into each other. So the many individual interests to travel to their destinations of choice are safeguarded by paradoxical traffic rules enforced by a system to ensure the needs of all others are also met, without either one destroying, dictating, or taking precedence over the other.
So, free-will is a relativity theory, its definition relative to a moment in time, its implementation relative to the interests of others. Hence, unless you favor the life of our great-ape ancestors dictated by brutal survival of the fittest, your free-will is best not implemented as a vile-maxim of selfish freedom void of respect for others.