You vote 3rd party or write in if you want to send a message to republicans that they need to select a qualified candidate. You may consider that a vote for Hillary. In that case, you need to ask yourself, would the country be better off after 4 years of Trump or 4 years of Hillary. Although I could never bring myself to vote for Trump, I don't really like Hillary. However I think she is certainly capable of running the country and I expect it will be here after 4 years without serious damage. I can't say the same for Trump.
Whether Hillary is corrupt or not, to me is not a primary factor. They are all corrupt. You just know a lot more about Hillary because she's been in the spotlight for over 20 years. What you see is what you get. There is no one in politics who has been the subject of more investigations, political attacks, and media witch hunts than Hillary.
The FBI spends months and even years to get a conviction on people such as those in the mob. They were guilty of many crimes, but because the FBI didn't get a conviction on each one doesn't make them innocent.
If you are thinking of voting for the screecher, consider this: her server which likely contained sensitive US information didn't even have basic encryption. That means a high-school computer geek could have tapped into it. So if people like Russia, China, North Korea have this information, they can easily use it to blackmail Hillary. She would be their lap dog. They will say jump, and Hillary would ask how high. And then there are all those shady speaking engagement contributions.
True, Trump could do some damage, but it's almost guaranteed Hillary would do more; not because she wants to, but because she'll have to. Nobody pays a half-mil to listen to a 20 minute speech unless the speech is nothing more than a front.