To not vote is not doing the least harm. The future president Clinton will be in a position to take certain limited actions that have the potential to improve the lives of women whose basic right to life, liberty and the pursuit of happiness have been fundamentally compromised by Republican party policies and their tacit support for harassment and terrorism. She will also be in a position to take certain measures to improve the status of millions of immigrants and potentially to get immigration reform. Hillary has a demonstrated record of working with members of Congress to get bipartisan legislation passed. Sanders has been much less effective. 
I understand that as a man who I assume is white, you have less to lose by not voting and helping the Republicans to maintain their stranglehold on the throats of women and continue their racist agenda. The hostility of white men to Hillary is well documented if not particularly rational. Trump is the alternative so go ahead and own it.