I tend to think of it less in terms of a deity poking and prodding to cure millions of individual cases of cancer and constantly fixing the universe of various things that could be called mistakes, and instead tend to think of it in terms of whether the foundation of the universe itself seems to have anything to do with love or not.I appreciate you comment here and you are right of course.
Its just the thought of a God with the power [presumably] of curing a child with cancer not doing so.
Overly simplistic perhaps?
Like, whether things like viruses and cancers and blindness-causing and pain-inducing microscopic parasitic worms need to exist in the first place, whether the predator/prey cycle where life constantly struggles against the possibility of a violent death from attack or prolonged death from malnutrition has to be this way, whether mass extinction events need to be part of the world, etc. The question is, what do these things say about our universe, and what do they say about the hypothesis that our universe is the expression of a deity so filled with love that it's beyond comprehension?
My position is that those things don't work well with that hypothesis, and I haven't seen convincing defenses by theists for their positions. So specifically I don't call those things disproof of the existence of that sort of god (actually I spent a long debate here once with a non-theist about that point), but instead simply view them as very strong evidence against such a thing, especially if no convincing explanation is given in defense of the hypothesis.
Now, that doesn't necessarily say that any sort of god can't exist in some way. There could be a pantheistic god that doesn't have self-awareness or concern for individual life or the overall quality of all life, there could be some impersonal Tao or some mystical concept like a life force or something at the root of the relationship between consciousness and the rest of the universe, there could be multiple gods that exist with varying levels of benevolence or malevolence or apathy that have limited power, there could be a deist clockwork god that set the machine in motion and then doesn't worry about the individual pieces, etc. Debating for the negative for those claims would require different types of arguments, with probably the main one being lack of evidence for their existence.