I have a mountain of objections to Obama’s second term as President of the country that is now my country, too. There is one argument in favor, though, and it’s a really huge one: the Supreme Court.
The next President will have a chance to seat one and maybe even two Supreme Justices (some people say three, but I don’t think that’s realistic). When I imagine that SCOTUS can get even more conservative than it is now, I get terrified.
So my suggestion is as follows: when you are about to vote, repeat to yourself 3 times “the Citizens United decision” and then decide how you want to cast your ballot.