I see a lot of comments floating around to the effect of “I’m not going to bother voting, we’re screwed anyway.”
Our choices aren’t perfect, but the only message you actually send when you choose to abstain is that you don’t care about the future of the country you live in. The best thing you can do is vote for the candidate closest to what you want.
Consider also: this is not just an election for the presidency. Other seats are up as well, including your local government.
Go forth and vote. It’s the loudest voice you have if you want things to get better.