Determinism just means that your decisions are the inevitable result of the past. This doesn't mean it's not your decision.

The opposite, non-determinism, means that your decisions aren't fully determined by your own past and experiences, which to me sounds like a greater violation of free will.

If "free will" is only a subjective feeling and not an objective state

If you don't require free will to be supernatural.

Right, will is a natural, deterministic feature