I voted for Obama twice and he certainly disappointed in several ways. But voting for the other guy would have been more disappointing.
What we tend to have is only two viable choices, and that's a consequence of using single-winner election with first-past-the-post voting; using multiwinner elections with a proportional election method (which doesn't have to be party-list proportional, candidate-centered ranked-ballots, multimember district systems like Single Transferrable Vote work fine for this) for legislative elections, and ranked-ballots single-winner elections for executive offices (but the first is more important than the second) can fix that (unfortunately, at the federal level, that takes people heavily invested in the system to vote to end it; which is unlikely to happen unless it becomes a matter of overwhelming public consensus, which it won't without being adopted at some level; however, in many states, it could be done for state elections through citizen processes without politicians voting it in.)
Still disappointment because they need to form a coalition. But that is what countries are: a group of people who despise eachother but have to work together because the alternative is even worse.