you are caught up in this partisan theatre. Yes, for you not voting means, that "the opposition" has a better chance to win an election. Its a completely different situation for people who don´t support either of the two big parties. I still think that its worth voting for smaller candidates - if there are viable ones. Still this has absolutely no influence on who is winning an presidential election.
I also understand people who think that elected politicians will never fix the problem from inside. At this point not-voting becomes is the reasonable action. The whole argument, that people who don´t vote lose their "moral" credibility to criticize politics is nonsense. Its a technocratic top/down argument used to discredit parts of the opposition, who reject the political process.
In the end Hillary won´t take money out of politics. Her husband did the very opposite and she is also the darling of certain rich elites. Naturally she´ll appoint liberal supreme-court judges, but thats like a drop in the ocean. The right direction, but simply not enough.
Obviously she isn´t honest about this, because that would be terribly unpopular. "We need more money in politics - Hillary approves this message." That would look rather silly. So she is doing what politicians do best: Some vague promises; nothing substantial; nothing that can´t be ignored afterwards.