"That downside is part of human nature, we would not be human without it"

Some say that we'll never be fully human 'with it'.

"our divinity which created us in his/her image should have had the opportunity to create us 'all good' but couldn't"

Yes, a popular argument says "If God is perfect, omniscient, omnipresent etc., why, with the benefit of perfect foreknowledge, create a flawed species then punish the pathetic beings with unspeakable suffering for getting things wrong?"

"Time is what prevents everything from happening at once" - John Wheeler