I have voted in every election since the 1970 one that Ted Heath won and I have never been so disappointed and disillusioned by the quality of the parliamentarians we have today. None of them deserve our vote, they are all appalling.
You have three options:
1) Don't vote. If you take this one then you can have no complaints about the result has you've abnegated any responsibility. In my opinion, a coward's way out.
2) Vote for the least worst option. At least you've done something.
3) Do something about it. Join a political party that represents your views. If you can't find one, set one up yourself. There's never been an easier time in history to use instantaneous communications media that can reach billions of people in one go, as long as what you've got to say resonates with them.
Personally I wish there were compulsory voting. At least then people reap the consequences of their own actions instead of being able to sit back and complain and wash their hands of other people's decisions.