Suppose that Clinton was genuinely committed to doing her best to serve interests that you think should matter. Even then, sooner or later, she'll pull something like the Nevada DNC, because that's her modus operandi. And that effectively negates your ability to make a positive change, because it disrupts the attempt to bring up and solve problems, discourages and harms people who are central to the process. So even in the most optimistic world you can imagine, where she's trying to help good causes instead of harm them, she interferes with and undermines those causes. Saying that Trump is "worse" at that point is just sugar to make you feel better.
How can people not feel helpless in a world in which the Clinton campaign doesn't tear itself down out of outrage at its own actions? Here's a campaign that was fomenting actual violence at a campaign event, and then blaming the other party for it, because apparently a campaign supported by top-caliber rights activists isn't peaceful enough for the Clinton clan. Imagine the effect of the same dirty tactics used against, say, another nation, where the people are more typical, and where the lives of everyone in the country is at stake. I wonder what would happen then? Oh, that's right, we don't have to wonder, because it's happened over and fucking over, and always when Clinton was on hand. Is it a coincidence that Arab Spring violence ramped up when Clinton stepped in? Or that ceasefires began to take hold after she left? How people are not more serious about find a way to keep her useless, uncaring self out of politics is beyond me.