This is a top thread

and a huge topic really. I think it gets right to the meat of life - the question of how to best view good and evil. Almost all of the questions you ask OQ are questions I have also asked. I'll give my point of view and understanding about good/evil.
I understand how you see many levels. I do, too. But let me start by saying that most of the bad that people "do" is due to learning, mistakes, and is unintentional. Therefore, people whose actions seem wrong or harmful, but are mistakes, are not evil or bad people, I'm sure you would agree. They were not born bad babies amongst the good ones. They do things like scratch another person's car by mistake and duck out without leaving a note. That sort of thing (until it happens to them or they realize it is easier to take responsibility than to live with the guilt, etc).
Another level might include people who habitually do bad things like steeling (for drug habits, for example), or who abuse their spouse or children because they are frustrated and conditioned perhaps by their own experienced abuse. They repeat bad behaviours because they are stuck in a loop. They also were not born bad babies, but they are very entrenched in harmful behaviour.
The third level is what I consider the "time bomb". These are babies that are not born bad, but they are born with a loaded potential to be bad or behave badly. It is beyond their control. They are intentionally created this way - from my understanding (from my spirit guides). An example of this type of person would be a psychopath with the potential to kill serially, or a paedophile. Once their internal bomb goes off, neither of these type generally reform no matter how much rehabilitation they receive. It stymies society, and it baffled me at one time as well. I spent lots of time buying and reading books on psychopaths because I was so fascinated and determined to understand who they are and why they behave this way.
So, are there bad people? No. But there are people that have been chosen as conduits of adversity (of varying severity). Their souls have agreed to be this type of conduit (time bomb). And it doesn't make for an easy life for them (and of course it is horrible for their victims, though their souls also choose this path of victimhood, too). Anyway, if you watch interviews with psychopaths, you can tell that they don't logically choose these acts (they are compelled!). Many will admit that no matter what, they know they will commit the offence again. (It reminds me of an interview I saw with a paedophile who had himself chemically castrated, and still, he knew he would continue the behaviour if let out of confinement). They know it is considered abhorrent in society. Yet they cannot stop. Because it is not their choice. It is God's will. We all do God's will whether we consciously agree with it or not. That's what makes life smooth or bumpy, how we flow with it or fight it. And though I am sure it would upset some to think God is capable of willing us to kill each other, that's what I've come to understand God does ("The killer in me is the killer in you"). God is the giver of life and the taker of life. God is all.
Why does God want there to be adversity? Because adversity is growth, it is friction by which muscle is gained. Without adversity there is nothing. It is the yin of the yang. God is all things. The larger God's diameter, the greater the sphere God encompasses. Balance is the key in this duality. For the greatest act that is altruistic and seems "good" (saintly), there must be an equally dark act that seems "evil" (a killer).
As humanity begins/continues ascending (or whatever the process is of moving out of duality - maybe it is into triplicity, not sure), we will no longer experience such polarities. There will not be such horrific acts, but there will also not be such seemingly saintly acts. Less highs and lows, more even keel. Adversity will always exist (I was specifically told this by my guide), but it does not need to be in focus as it has been. It can be smaller seeming and more blended into the whole of love. The more balanced a person is, the less frequently and intensely they will experience overt adversity.
From my perspective, the only control we really have is in fighting or flowing with divine will. I find it best to flow...

To allow. To cease seeking control. To let go and let God. To trust that God has got it all in hand. It thus stands to reason to me that when there are less people seeking to "do good" then there will be less need of people seeking to "do bad".

Let the dust settle and just "be".