Gnostic, a wise man once said something along the lines of, if you have problems with democracy, try living in a dictatorship for a while.
I find some of the sentiments that you have described very depressing. I fail to see how opting out is an answer to anything. If the citizens that you refer to feel so strongly, and yet behave in such an apathetic way, they are asking for things to get worse, not better.
They should all be joining a party of their choice, and working together to bring about real, lasting change.
Finally, I have been around for a long long time, and I have lived in places where there are genuine problems with the system of democratic government (Thailand) or no democratic government at all (Hong Kong). Australia has its problems, but in my humble opinion, in all the Federal elections that I have ever witnessed as an adult, every single time the electorate got it right. I certainly did not agree with them, a few times. But the fact remains, they are us, and we are them.