I do not know there isn't free will, but I know there is nothing that suggests there is, other than this strong feeling we seem to have, which can't be trusted. So far, the universe seems to be deterministic, and our choices seem to be the result of deterministic reactions in our brains.
I dunno, I do take your argument about our feelings on the matter not necessarily being a useful guide.
Then again, deterministic actions (which is an assumption) in our brains do not necessarily correlate with a completely deterministic human. Perhaps the computation of such quantities as may be involved is impossible, and this would lead to a situation where even a completely deterministic universe could be compatible with the experience of "free will".
We probably need a better term for this sensation, as "free will" is a particularly loaded term.
