Clinton had a chance to win (and wasn't far from it, actually).
If you have a means of visiting alternate universes and/or timelines then you correct. However, in this universe and this timeline you are incorrect. Clinton had zero chance to win as demonstrated by the fact that she didn't.
Speculating on what would have happened if 100,000 people did something other than what they did is pointless. And you're making a big assumption in thinking that 100,000 people who didn't vote for Clinton would be happy if she won.
I didn't want to Trump to win and didn't vote for him, but I'm glad Clinton lost. I certainly wouldn't have felt good if I learned I was the person who put her over the top. If Clinton had won it wouldn't have been the end of the world, and the world isn't going to end because Trump won either, but neither one of them deserves to claim that I voted for them. My vote counted and is reflected in the election results as part of the small but statistically significant percentage of the US population who took the time to go out to their polling place and register their belief that neither Trump nor Clinton are a worthy choice as president of the US.
Unfortunately the polls don't distinguish between the opinions of "I think Hillary Clinton will be the best president ever" and "I think Hillary Clinton will be the worst president ever but I'm going to vote for her anyway" so I would say people with the second opinion threw away their vote by making it indistinguishable from people with the first opinion.
Now, for someone who thinks that Hillary is fantastic but voted for someone they thought was just a tiny, tiny bit better, then maybe that wasn't a good choice. But for someone who thinks that Trump and Clinton are both horribly bad choices, voting for the one who is marginally less horrendous is not a rational course of action.
What makes you think you can even claim that 100,000 people in Wisconsin were on the edge of choosing whether they loved Clinton more than the third party candidate they voted for?
Maybe those 100,000 feel like the choice between Trump and Clinton is the choice between drinking out of a septic tank or out of the pre-treatment tank of a residential sewage treatment plant. Maybe they voted for drinking out of a clean mountain spring even though they new they'd end up drinking sewage one way or another. And maybe they're glad they didn't vote to drink sewage even if that's what they ended up with.