It also doesn't help that in situations like this, both major parties are moving in lock step. You cannot vote against something that both party stand for.

Terrance McKenna once said that the worst president was the one in power, regardless of when it is. It is because for the most part, they just keep building on the existing frame work, standing on the shoulders of those before them.

Now one could argue that Trump is doing the opposite this term, but depending on were you stand, this might not have been a great out come.

The answer is to vote in the primaries. That's how you unseat a 'safe' seat. I'm not going to say its a good answer, because the primary system and the two party system in general are terrible, but its the best choice you have besides running yourself.