Therein lies the problem. If you're voting a party based on the figurehead don't bother filling your ballot out.
I don't like Shorten either but the ALP like the LNP formulate their policy, it's up to the leader to sell it. Shorten has the ALP united though (granted that's easy to do in opposition and when the government is a shambles,) and I feel their policy is significantly better than the LNP.
The LNP have had six years, and were/are a circus. Yes, the ALP was before them also, but I also believe if you can't vote a good government in, then vote a bad one out.