the question is whether humans have control over their actions. human operations are definitionally relevant.
you seem to suggest throwing away determinism because there are open questions at extreme scales. but determinism does explain reality at the scale we're interested in, and you haven't offered a comparable explanation.
occam's razor would suggest we take determinism seriously until we have another theory which more clearly explains the phenomena of interest while also addressing the challenges you've raised. and it seems that most people do take determinism seriously, which is why free will is such a debated question.