Is the concept of hard determinism merely semantic trickery?

What I mean is that it's really easy to prove hard determinism and a complete lack of free will. It's simply a case that every refutation for hard determinism gets 'feed-back looped' into the definition. For example one could say 'if multiple time-lines exist this disproves determinism'. But then you can just expand the notion of 'everything' to include multiple dimensions. Then you can say that there are determining factors underlying the workings of multiple dimensions. Or if someone argues that chance disproves it, then you can say that chance becomes a part of the sum of determining factors. Or whatever argument one makes against it. Could it be that this is really just 'labouring' (so to the speak) the notion of free will beyond all common-sense and feasibility?