Adam and Eve were told they would be "Lord of all the earth" - and "Adam" and "Eve" are generic terms for "man" and "mother". Thus . . .
I believe we have been given the power and authority to "be God" on this earth - that our decisions and actions (our allegiances - whom we follow and emulate) determine who is the God of this earth.
So, why does God allow terrible suffering and abuse?
Maybe it's because we aren't willing yet to step up and assume our intended roles - and we allow it to continue and be so pervasive. We like to blame God, but we aren't willing to see ourselves as the God we are blaming. In my own sphere of influence, I am that I am - but it's easier to shift the blame to the great I AM and not tackle what goes on around us in our own kingdom of embryonic gods.
Yes, there must needs be opposition in all things, so suffering is inevitable. How we deal with it, however, is up to us. If we know someone is being abused and do nothing to stop it . . . if we know people are starving and do nothing to feed them (or simply over-consume and keep resources from them) . . . if we know women and children are being forced into prostitution and sit back without trying to stop it . . . if we know of evil and don't fight it . . .
We can believe that such things are a result of the Fall and part of the Plan, so, in a way, we can say God is responsible for their existence - but WE, collectively, are responsible for the degree to which these things flourish, and we have examples of peoples who banded together and simply refused to allow them to continue within the spheres of their own influence. They stepped up and represented God, in a very real way - and they changed the world around them.