There are plenty of third party candidates to choose from. Perhaps you should look at one of them, if you don’t like the major party choices. According to
politics1.com, these include:
Darrell Castle, Constitution Party
Gary Johnson, Libertarian
Chris Keniston, Veterans Party
Jill Stein, Green Party
Evan McMullin, Independent
Gloria LaRivera, Party of Socialism and Liberation
Rocky de la Fuente, Reform Party
Emilio Soltysik, Socialist Party
Alyson Kennedy, Socialist Workers Party
Then there are a dozen or so candidates on less than 5 state ballots, and what looks like a few hundred running write-in campaigns. Surely there is one of these that you can vote for in good conscience.