To be fair, it was the scene where Yukine tries to sexually assault Hiyori in her sleep that killed the show for me, rather than anything Yato does.
Though I still think he has no positive traits at all and pains me to see the show constantly back him up.
I don't really hold gods and spirits to the same moral standards as living humans. Yukine is annoying but if I view him as Yato sees him based on his own worldview, rather than as a human boy with a stake in behaving like a rational human being, it makes a lot more sense to me.
Yato is pretty popular though. I can see it being hard going if you want to see less of him.
R