Compatibilism fails because its definition of free will doesn't fully account for determinism,
It does.
Given its definition of free will, acting without being forced or coerced, Compatibilism neglects to account for inner necessity; that every action is produced by deterministic processes, which are not subject to will, wish or desire....on the contrary, will is fixed, set, determined by that process. Consequently, compatibilism fails to take into account the inconvenient fact that all actions, including will, are produced by a deterministic, evolving process.
where selected external elements are used, absence of force or coercion,
This is how compatibilist free will is defined.
Sure, it's carefully worded in order to give the impression of a valid definition of free will in relation to determinism ,
The definition is a flawed foundation for an argument for free will, an argument where none exists. The argument fails because all actions within a deterministic system are produced by a process, the evolution of the system from past to present and future states with no deviation or freedom of will, where will and action must happen as determined.
Definition of freedom
1: the quality or state of being free: such as
a:
the absence of necessity, coercion, or constraint in
choice or action - Merriam Webster
Determinism is not the absence of necessity. The opposite is true, it's a system where each and every action that happens,
necessarily happens as determined, where there is no
choice in action.
The reason you find this definition unsatisfactory is because you don't understand compatibilism and appear only to be able to think of free will in terms of libertarian free will
It's not that I find it unsatisfactory, but that it doesn't relate to the role of will or how is formed.
Again; ''Wanting to do X is fully determined by prior causes. Now that the desire to do X is being felt, there are no other constraints that keep the person from doing what he wants, namely X.''
So, if determined, not only is there nothing to prevent the person from doing what he wants, he in fact cannot do otherwise, the action must proceed as determined.
Where both the wanting and the doing is inevitable.
That is not free will. It is the reason why the compatibilist definition fails.
Until you understand that libertarian and compatibilist free will address totally different questions you'll continue to argue against a strawman version of compatibilism.
Compatibilism is the issue here. Libertarian free will fails for other reasons. The point being, freedom of will is incompatible with determinism, probabilistic systems, or random events.
The brain is rational system that doesn't work according to will, be it labelled as 'free' or not.
An ideology for some, a cherished concept for others, free will is an illusion.