@davek it seems you want the right to participate how you choose (not voting, soiling your ballot, etc), but not take any responsibility (moral or otherwise) for the outcome of said participation.
At least those voting for Biden do so in the expectation that what will occur in the future will be better than what would occur under Trump - and having tried in some way to make a better pathway for us, they have a much stronger moral argument than you.
Having seen the actions taken (or not taken) by each man when serving as President, there is no doubt that Biden is the better choice on many dimensions.