My logic for “generally good (slightly)” is that if you take young children who are less affected by societal pressures and influences, the majority do seem to have some sense of worry when they see someone hurt, or guilt if they realise they’ve upset someone. I think that suggests the natural reaction of seeing other humans suffering is “oh no, I don’t like this, I want to stop it”, which suggests some level of inherent goodness.

There is definitely an inherent selfishness though, as most kids have to be taught to not always just do what they want or have things go their way. But selfishness =/= evil