I'll put it another way: I'm anti-Trump. By extension, I think people who vote for Trump exert a negative influence on society by casting their votes in his favor. It also happens that these voters are predominantly rural. I also don't think rural voters should be disenfranchised, and if Trump wins the election, so be it.

Part of the idea of democracy is that you do want your preferred party to win, but that doesn't automatically mean you're against all the other teams having the right to vote. It certainly can be the case that a demographic or rules change makes it harder for your team to win. That doesn't mean you are against that change, whether it's universal suffrage, proportional representation, etc.

Support for fair and legitimate elections are usually a stronger foundational principle than one's support for their own favorite party. Especially because their party's victory would be empty if it wasn't won legitimately.

As for whether libertarianism and democracy are at odds, I really don't know myself. I think it's fine for Thiel to have his own opinion on that.